In the episode 'Dead End' transmitted on 19/10/08 you had a Bus Driver who had just been released from Prison,having had his conviction for Causing Death by Dangerous Driving overturned,working in the Town where the accident,which killed 4 people, occurred.Cant see it myself!!
why? you can assume he was from that town, so it makes sense he would go back there. he was a commercial driver so the likely job he would go for was driving, and as his conviction was overturned he was therefore not guilty of anything in the eyes of the law so the bus company couldn't turn him down for the job on his past quashed conviction, as the manager said in the show. what's so unlikely about it?
Any company with any decent lawyer can find grounds to not hire someone, be it the most mudane but justifiable reasons.. Life works abit differently than you seem to believe.