"Secrets That We Keep" is the 464th episode of Casualty and the 18th episode of the 19th series. It was preceded by "Casualty@Holby City - Part One" and followed by "Fathers, Mothers, Daughters, Brothers". The episode was directed by Chris Lovett and written by David Robertson. The events of this episode take place the day before the airdate, on 31 December 2004.
It is New Year's Eve and the hospital is in chaos. The building is not yet repaired and there is an influx of patients with stomach complaints. Everyone is reeling from the shock of Jim's death. Harry gives the staff a talk to keep morale up. Half-way through Charlie bursts in saying Happy New Year – he is back from Canada early and has decided to come to work. Harry reveals the events of last week to him.
Selena continues to take every opportunity to snipe at Bex. When she mixes up the names of two patients Selena reprimands her. Bex tries to get her own back when Selena does not fill in a form properly. Bex tells her she is inefficient, but Selena says that Bex is being petty during these difficult times and Harry agrees – putting Bex firmly in her place. Tess sees this and Bex tells her she cannot take Selena's bullying any longer.
Abs tells Ellen to hurry up and fill in her work visa forms so their charade can end. Abs tries to talk to Nina, but she says she will only talk to him on a professional level. Later, Abs is asked to attend to a patient that is trapped in a car. He works with Nina, who is surprised to see him there. The atmosphere is frosty but improves as they work together. Ellen tells Abs she will stay behind at work to fill in the forms. Abs invites Nina round to talk and he tells her that he is finding pretending to be in love with Ellen near impossible. Nina tells Abs to stop talking and kiss her. He moves in for a passionate clinch, but Ellen bursts in crying. She tells Abs that to get her visa she must go back to the Czech Republic for three months.
Comfort is still staying with Tess. She tells her that she cannot afford to pay for a lawyer to get her flat back. Claire mentions to Tess that she is going to her brother's party later – he is a lawyer. Tess tells her about Comfort's predicament and Claire says her brother may be able to give Comfort a special rate. Later, Claire invites Comfort to the party and says she has spoken to her brother Pete. He says he will take on Comfort's case and will only charge expenses.