Casualty (series 20)

Joanne is teaching a group of asylum seekers English while protestors complain about their presence. With Charlie and Selena still off sick, Tess briefs staff on MRSA protocols and Maggie meets old colleague Bruno Jenkins, who she doesn't get on with. Woody and Luke bring in a woman with an injured ankle; Woody tries to chat her up but Kelsey tells the woman that Woody has a wife and children. Protestor John-Jo throws excrement at a group of new arrivals and his friend Davie hits a boy with a rock; Egyptian doctor Nazem, who fled his country after converting to Christianity, saves the boy from being paralysed by stabilising him. A building expert, Imed, visits building manager Banks with evidence the asylum seekers' flats are unsafe but is ignored. The building then collapses; Davie is killed by rubble and several people are trapped inside. Tess, Maggie, Abs and Ellen go to the scene with a medical team, while Fleur, who was visiting Sam, has to leave the department. Joanne appears uninjured but turns out to have an intracranial bleed. Bruno knows Maggie's husband Steve is in prison, not dead as she claimed, and arranges for him to visit, shocking Jamie. Kelsey shows John-Jo footage of him throwing the excrement: He explains his family were forcibly relocated from the flats when the building, built on a mine shaft, was deemed unsafe only for the asylum seekers to be moved in. Imed gives the police the evidence of Banks' negligence; he is searching for his son Mero but is injured saving Josh from falling rubble. Harry and Guppy learn Nazem has been performing female circumcisions: Although he took no money and only did it to make sure it was done right, he will have to be reported and probably deported. Comfort finds the severed arm of a patient; it cannot be reattached but she gets her wedding ring back. Tess and fireman Lance are investigating a crying baby when the floor gives way beneath them.

Guest starring Damien Nash, Phillip Lester and Kammy Darweish

Tess and an injured Lance end up trapped in a lower level with others including Mero, who helps Tess treat Lance and the others and finds the baby she heard. They are on a platform over a sheer drop and fire crews attempt to dig a way across to them. Maggie realises Bruno called Steve to make trouble for her and Harry orders him not to tell the rest of the staff. Steve is serving eighteen years after killing a till girl during an armed robbery and is due for parole in a few months; he has been contact with Joanne for months, after Stan let slip to her that he was alive. Joanne recovers but Jamie wants nothing to do with his family. Guppy and Kelsey learn a woman from the asylum seekers service is having a relationship with one of the refugees, who is actually fifteen, not twenty as he claimed, having posed as his late older brother. Fire crews get Josh, Luke and Woody to the platform and Tess, Lance and the baby are got to safety (the other wounded having died) but Mero is still on the platform when it collapses. Imad is informed he has died but Nina later brings Mero in alive, after he somehow managed to break his fall.

Harry tells Guppy that he is going to report Jas but Guppy convinces him to let Jas resign quietly and Jas agrees to halt the drugs trial. Fleur convinces Sam to go off his medication and help her sell sleeping tablets. An elderly homeless lady comes in; Bruno thinks she's a timewaster and tries to get Tess to force Guppy to discharge her but Tess sides with Guppy and it turns out she has a stomach ulcer. Her daughter turns up after being drunk-dialled, having not seen her in a year after she disappeared when her marriage broke down and her business failed, and they are reunited. Woody helps a young boy, Matt, whose leg has become caught in the ladder at a swimming pool, holding him above water until he is freed. Matt's mother Susan is hostile towards him and Woody later realises he had a one-night stand with her around the time Matt was conceived. An army sergeant, Morrison, is tough on a new recruit, Kim, making her keep her mask off during a gas chamber exercise until she chokes and accidentally injures another recruit lashing out. Nina knows Morrison having trained under him. Kim claims Morrison gives her a hard time because she rejected him but later admits it's a lie; Morrison explains he is harder on recruits he thinks won't make the grade, because it's better to have them fail in training than in the field. Scans shows Kim has sarcoidosis, which would end her career. She goes to a field with a rifle, intending to commit suicide, but Nina talks her down.

A man, Shane, breaks into a restaurant and tries to steal the till but ends up fighting with Enzo, the owner's son, who throws him through a window. His brother gets him to hospital and calls his pregnant girlfriend, Carrie. It turns out Enzo, who suffered a detached retina, is Carrie's ex. They talk about getting back together, but when he is still unable to stand up to his mother over her, and suggests seeing each other in secret, Carrie decides to ditch both Shane and Enzo. Jas tells Harry that, if he reports him, he will return the favour and report Harry for self-prescribing and working without being cleared of MRSA, and threatens to disown Guppy if he goes against him. Harry treats a trainee medic for thyroid cancer. Guppy meets a frequent flyer who talks about endlessly about his grandchildren, and becomes more indulgent on learning he actually has no-one. Josh and Woody are called out by a boy whose father took a fall while camping. He gets lost trying to lead them back to him and they split up to search. Woody eventually guides Josh to the father after climbing a tree, then has to save the son from falling off a cliff. It turns out the son thinks the father blames him for their dog eating poison and the pair reconcile. Woody has Sam look up Matt's date of birth and learns it matches. Sam is surprised when Fleur cancels a night out to accept a dinner invitation from Tess. Ellen tells Kelsey she is in love with a married man. Hearing Selena is being discharged from hospital, she arranges for her to catch her with Will. Selena walks out and Will throws Ellen out after her.

Sean, an inmate at a young offenders institute, is brought in after swallowing razor blades. Abs, who spent time in there, recalls one of the officers with him, Calder, as a bully and realises Mark, a boy hanging around reception, is planning to break him out of jail, convincing him to leave. Sean was being bullied and tried to report it, but Calder told the bully about the report, resulting in him being gang raped. Luke and Nina try to transport him to St James for surgery but Mark thinks they are taking him back to young offenders and rams the ambulance. Mark is arrested, as is Calder after punching his colleague, and Sean is taken to surgery. Will turns up to speak to Selena and she throws a bottle of urine over him. Nina is visited by an old army colleague, Sarah, who it turns out she had a relationship with, a fact she hides from Abs. A young man is brought in after having a seizure in his hand while working on a lighting rig. Harry and Bruno realise his symptoms are consistent with Huntington's. His mother admits she had an affair with a friend around the time he was conceived who later died of Huntington's and never knew whether he or her husband was the father. One of Jas' patients is brought in with angina; it transpires Jas didn't run the proper tests on him and he probably has cancer. Harry and Guppy advise him to report Jas.

A new paramedic, Si, turns up at the station. Although he isn't on the roster, Comfort allows him to accompany Woody. Josh is at the hospital undergoing retraining and is placed under Bruno's supervision. An elderly woman dies of a stroke and Josh accidentally upsets her husband by wrongly stating there won't be a post-mortem. Harry reveals Charlie is taking a sabbatical to teach an advanced carers' course. Two sisters get into a fight, with the older one beating the younger one who had been bullying her. Their mother, who is part of a protest group against a paedophile being rehoused in the area which had earlier blocked an ambulance's path, assumes he attacked them and the older sister goes along with it. Selena is suspicious and it turns out the younger sister has internal bleeding and a tampon thrust down her throat. She had been taunting her older sister about going through puberty before her; the older sister's puberty has been delayed because of her poor diet. Jas is escorted from the hospital and disowns Guppy. Woody is annoyed when an older woman complains of back pains solely so the paramedics will move a wardrobe for her but Si helps her out. A patient complaining of toothache is actually researching ghost sightings at the hospital. When Selena tells him he has angina, he doesn't believe her and leaves. Woody and Si find him collapsed and Si makes a mess of treating him. Woody realises he is an imposter and handcuffs him to the ambulance. Nina tells Abs the truth about Sarah, which leaves him uncomfortable. Tess lets Fleur organise a party at the house for Sam's birthday but is shocked when she tries to turn it into a rave while Fleur is annoyed Tess has invited staffmembers. Fleur drugs Tess and stands over her with a knife.

Fleur leaves Tess on the bed upstairs and tells Sam she passed out drunk. Si flees when Woody nearly crashes the ambulance and they stumble across a man impaled on railings. Woody sends Si to summon help, calling in Harry and Comfort. Si explains he has a first aid certificate and wanted to help but realises how serious being a paramedic is. Woody reports him to the police but lets him leave. Susan admits she isn't sure if Woody is Matt's father or not but agrees to him getting to know him. Josh finds a teenage girl dead in the toilets from an overdose. He is incensed to learn that Bruno spoke to her and dismissed her as a timewaster. Guppy learns his mother won't speak to him. A woman is brought in with bowel obstructions and her son worries she has cancer like his father, who died three years ago. In fact, she has a hernia from dancing with her new boyfriend. Abs speaks to a friend, Joey, who knows Fleur and considers her a psychopath. Abs, Nina and Sarah go to the house where Fleur barricades herself, Sam and the unconscious Tess in the bedroom. She tries to get Sam to join her in a suicide pact but he refuses and stops her attacking Tess. Fleur is taken into custody, Abs and Nina make up and Sam is convinced to get help.

A young girl gets up during the night to get an ice cream and is found in the freezer by her mother next morning. The parents clash at the hospital but after a lengthy period warming her up, the staff manage to restart the girl's heart and she is taken to intensive care. Harry's au pair quits on him suddenly so Ellen takes over looking after the children and manages to convince Kizzy of the importance of what he does. Woody spends time with Matt without telling him he might be his father and takes him out in an ambulance, but when they are pulled over to the scene of a car crash, Josh reprimands him. Guppy finds a woman has a worm in her foot from drinking infected water and Bruno charges staff for a look. The patient takes some of the money off him, unaware how much he really made. An Asian woman is brought in after being beaten up. Suspicion falls on her husband but another man brought in after a beating turns out to be a loan shark who ordered the first beating; his wife is disgusted by his attitude.

Josh, Comfort, Woody and Luke are putting on demonstrations at an unruly school, where only new headteacher Carl seems to have any influence. One of the boys, Kris, is possessive of his girlfriend Emma, who is actually having an affair with a teacher, Nick. Carl is aware and is letting Nick resign quietly to avoid a scandal. At the hospital, a young man, Conner, comes in after an accident sword swallowing. Tess tells Kelsey to get rid of a pumpkin lantern which Conner's friend Beth slips on. Abs learns Beth is actually Conner's social worker, Charlotte, and was worried that Conner's actions made her look bad. Two of the boys, Adam and Neil, steal entonox gas from an ambulance to get high. Another one, Adrian, encourages Emma to try apple bopping and she and her friend Shania are badly burned by a chemical in the water; Emma asks for Nick, tipping off everyone. Frustrated at the lack of space, Josh ends up hitting a young boy, Jack, and Woody considers reporting him. As the ambulances are leaving, Nick is attacked by Kris and his gang. Luke, Woody and Comfort step in and he is taken to one of the ambulances but Kris and the others attack it, throwing Luke out and driving off with Comfort and Nick on board.

Guest starring James Gaddas, James Anthony Pearson and Jason Maza

Josh chases the ambulance on his bike, while Comfort is beaten by Kris and his friends trying to protect Nick. The ambulance crashes into a car and the boys free. The couple in the car, Edgar and Moji, are treated; Edgar is awaiting a heart transplant and Moji hides the fact she is pregnant from him. Nick needs surgery. Carl finds Adrian at the hospital and realises he was behind the acid and still has a vial; Adrian is burned while Carl is getting it away from him. Luke tells Josh they will support him over hitting Jack. A woman, May, fakes abdominal pains to get staff to investigate her boyfriend Perry. Tess learns he has Parkinson's disease. He tells May who agrees to give the relationship a chance. Tess discovers Comfort has collapsed from a head injury.

Guest starring James Gaddas, James Anthony Pearson and Jason Maza