Ollie inadvertently arranges a date with an old flame, Emma discovers that Tony has managed to get a date of his own, and Darren is left alone to work for a client with whom he shares a bitter past. When Ollie confirms the Client's name to Liz, she informs Ollie that he has just left Darren with the person he hates most in the world. But when Ollie quickly goes back to the Client's house, Darren and him seem to be "friends" - but when Ollie leaves, it seems that their "friendship" is just for show. How long can Darren's past stay in the past before he loses it with the Client? And why does Ollie think that Emma wants a threesome with Ollie's hold flame?