Ollie swaps the job book for a fancy new phone app, which soon lands him in hot water. Tensions between Emma and Liz rise, while Darren struggles to come to terms with fatherhood.

When Darren fails to turn up for work, Ollie, Liz and Tony must investigate his whereabouts, unravelling an action-packed mystery - which leaves Emma to deal with Ollie's move into his new flat by herself.