"Three's a Crowd" is the 879th episode of Casualty and the 12th episode of the 28th series. It was preceded by "Crush Syndrome" and followed by "Badge of Honour". The episode was directed by Tim Leandro and written by Kevin Rundle.
Plumber Graham and his son Jake are struggling to sort out a leaky water tank when they discover a hidden stash of cash - but the next thing they know they've crashed through the rotten floorboards into the bathroom below. And when they turn up at the ED, they are closely followed by home-owner Paul - who wants his money back. Meanwhile, Sam treats a bride on her wedding day, unaware Tom is intending to propose to her. The only problem is, he's let slip to Robyn, and the gossip is spreading round the department. Can he get down on one knee before she hears it from someone else?