She and Josh talk down a couple arguing after a road accident, but when they are called to the flats where she was stabbed, she refuses to go in without back-up, waiting twenty minutes for the police.
Guest starring Jack Fortune, Radhika Aggarwal and Zienia Merton Dillon has spent the night with Heather but it comes to an abrupt end when he gets a call from Lara updating him on the court case.
Their handler is chased off by new security guard Ryan Johnson and Samera explains Mariam's husband died leaving them in debt and the smugglers are holding her children.
Guest starring Kiran Dadlani, Seema Bowri and Simon Bowen A woman, Hanna, is brought in by her sister Sonia: She has a pulmonary embolism but has messed up her warfarin and ibuprofen, causing severe bleeding.
A very young boy tells Jack and Ryan his mother is ill in the car park; she is diabetic and has gone hypo but Harry and Anna manage to revive her while Roxy looks after her son.
She is informed she will be restricted to minor injuries and barred from rape and domestic violence cases for a trial period, and a mother refuses to let her treat her son.
She collapses at an airport and Simon realises fertility drugs have caused an ectopic pregnancy: They were planning to sell her eggs in the United States, which is illegal in the UK.
Guest starring Tehmina Sacranie, Matyelok Gibbs and Matthew Devitt Simon and Duffy are both unhappy about Lara having to be supervised but Harry tells them the order came from higher up and there's nothing he can do.
Although Harry tells her to stay away from the case, when Anna asks her to look at the scan, Lara realises Paula is in the early stages of TB and the two women clear the air.
Jack makes a feeble but successful attempt to threaten him into keeping quiet; he claims he was staggering around drunk and the driver is charged with drink driving.
Fin and Comfort spend the shift coming across elements of the Christmas story: A man who fell off his roof hanging an angel there, a shepherd who injured his leg and a young woman giving birth surrounded by virgin oil in a restaurant run by three wise men.
Josh misses the party, despite it being his and Colette's first anniversary, to play Father Christmas at a fire service charity do, where he helps a boy who chokes on a balloon.
Guest starring Des McAleer, Seeta Indrani and Dominic Power Roxy and Dillon treat one of the workmen repairing the damage to the hospital when he puts a nail through his hand.
Guest starring Peter Vaughan, Suzette Llwellyn and Joe Figg Merlin Jameson is introduced Colette moves out of Josh's to stay with Comfort and confides in her about her liaison with Simon.
Lara is left looking after him alone as his appendix ruptures when Reeve-Jones calls Harry and Simon to help with a private patient: A teenage girl who has developed an infection from a breast enlargement.
Harry criticises the girls' parents for giving her the operation before her body had fully developed, as an attempt to fix image issues, despite being refused an NHS referral.
Guest starring Rhiannon Parry, Amelia Curtis and David Walliams A priest, Gerry, is leading a protest demonstration outside an abortion clinic.
However, her husband Ian covers up the matter with the police, knowing his father Bill was responsible, and Sheila tells hospital staff she fell down the stairs.
Guest starring Kevork Malikyan, Desire Densiti and Karen Ascoe Merlin sees a man throw himself into an empty swimming pool.
However, when they arrive they find the man's wife has turned up and seems fully aware of the situation: He embezzled millions of pounds from his employers, resulting in two friends being made redundant.
A young woman comes in with chest pains and Merlin is shocked when she dies from an undiagnosed hereditary heart condition: She was adopted and never looked for her birth parents so was unaware of their medical history.
His father gives him beta blockers when he falls ill, causing a distracted Simon to think nothing is wrong, and he needs emergency treatment in Resus.
A diver hit his head on the board as a result of the blackout; he turns out to have an intercranial bleed and Harry has to drill burr holes in the dark, saving him.
Guest starring Helen Murton, Aaron Neil and Charlie Morley Ryan tells Duffy he has returned all the money he stole and bought a country club in New Zealand for them to run together.
His illusions shattered and learning that he has stopped his father getting urgent treatment for a perforated ulcer, the son ignores Lara's attempts to get him to surrender and shoots himself in the head.
Jack and Nikki are booking their honeymoon when they stumble across a fight at the travel agent's: Keith has found his wife Maeve going on holiday with his best friend Dean.
However, further investigation shows he left before getting his diagnosis and actually has TB: He deliberately gave up his money, job and home and drove his girlfriend away by stealing her credit cards, thinking he was dying.
Guest starring Raymond Coulthard, Anthony Ofoegbu and Jane Slavin Lara wakes up alone in bed in Luke's flat with no memory of the previous night.
Josh and Nikki witness a car crash into a parked vehicle at a service station, leaving a young boy, David Laing, trapped inside.
At the hospital, a young couple are brought in after being in a minor motorbike accident; the lad let the girl drive the bike and she crashed into roadworks.