Determined to find the source, Zoe pieces together the puzzle, but can she alert the authorities before all evidence is destroyed?
Elsewhere in Holby, a young worker Bart heads off on his motorbike to meet his girlfriend Bethan. Rather unsteady, he looks like he has never ridden the bike before, much to the amusement of his fellow workers. But as he continues to drive, he struggles to control the vehicle, creating a pile-up which, unbeknown to Bart, has devastating results for Bethan.
Meanwhile, after a long shift, the team finds some light relief when they don their fancy dress to head to a Halloween party. As Tom and Sam mess around in the staff room they kiss, but stop only to find that Dylan has entered the room. Did he see?