Playing With Fire - S4.E5

Gordon is doing a survey on how much electricity is being used and writes out a lot of forms for the staff. Colin meanwhile does an experiment which involves using the lavatories. Then Gavin gets a big shock when his old girlfriend Jenny comes to the centre to see him, but it comes as a surprise to Gordon which really upsets Tim a lot. Then Gavin tells the secret to Laura and to everyone and then realises that she came from a clinic. It also comes to a shock when he finds out she isn't cured. Then Gordon gets things out of control when he makes Jenny very angry.