 They argue, and Ronnie smashes up the Albert bar, before she tells her relative Billy Mitchell (Perry Fenwick) she is going to kill Dean.He warns Mick, and eventually Dean's parents Buster Briggs (Karl Howman) and Shirley, who arrive after Ronnie has given him a drink full of crushed up drugs.She reveals it was only a plan to scare him, but it is enough to make Roxy confess to Dean that Ronnie is a murderer, so he convinces Roxy to go to the police.