'We didn't start the fire...' is what you'll be singing after watching tonight's Emmerdale. Or not. Robert probably did though. Katie is still determined as ever to discover who he is having the affair with, and it's starting to cause quite the wedge between herself and Andy, who's suddenly all palsy with his bro again. Robert even asks him to be his Best Man tonight! Meanwhile, Chrissie questions Lachlan about his new girlfriend, feeling uneasy over his secretive behaviour. Later on then, Lachlan has a bit of a run in with a knife at Farrers...