Bart arrives early to catch Von on her way to Annie's house; he's hoping that Von will keep him up to date with how it all goes? Von agrees guardedly, she isn't blind to Bart's deeper feelings. The arrival of Tegan Willis, cuts short any further conversation, she's traumatised and looking for her boyfriend who fell off their balcony last night. Bart leads her in where Charlotte and Frank take over - they'll try and track down the missing man... But when Tegan sees Dan at the base, and is convinced that he's the man in question, Frank realises they've got a bigger challenge on their hands.

Colin Corrigan seems to be suffering from an almost perfect, textbook case of appendicitis. At least that's how it seems to Mike and Bart; but when Gabrielle tracks down his files only to discover that he's already had his appendix removed as a child, the race is on to find the mystery illness. As his condition deteriorates, and the results continue to turn up blanks, Mike thinks to check the file info with Colin in the unlikely event that the forty year old records have been mixed up. They get more than they bargain for - Colin's records are indeed the wrong ones, but there's been no mistake about it. Colin is not who he says he is - and his reason for doing what he is doing will force Mike to confront his own buried feelings about his own son, Simon.

Meanwhile Jack and Zoe are placed under the hammer when Brett Thomas is rushed into the ED, in arrest after a being electrocuted train surfing. He's on the knife's edge, but Jack and Zoe are equal to the challenge, finding a working rhythm that seems to surprise them both. An idle conversation about stupid, dangerous things they did as teenagers leads Zoe to commit her own reckless act when she lies to the Bed Manager to get Brett into an ICU bed. Her lie gains the respect of Jack and Erica, and the ire of the Bed Manager.

And at Annie's first chemo session, Von gets confirmation that Annie's feelings for Bart run a lot deeper than former doctor and former patient. Later, Bart arrives, and it's clear the feelings are reciprocated. And now that Bart has made his intentions clear over Ann-Maree, what will be the consequences, both as a doctor and a man?

Frank discovers that Tegan is having a psychotic episode, reliving the suicide of her boyfriend that took place a year earlier, almost to the day. The truth, however, is more than she can cope with and she has a severe mental breakdown in the ED, only narrowly avoiding being restrained by Dan's ability to connect with her. The rawness of the situation leaves our team heavily affected, crystallising matters of the heart in their own lives...

Dan tells Erica that he loves her, for the first time. And Mike Vlasek confronts his own secret - finding Simon in the grounds, he tells the boy that the man who saved his life is also the man who ruined it. Will Mike's revelation to Simon get the result he desires? Or, in trying to do the right thing will he make everything much worse?