With little over fours remaining, Nixon must rally the team to discover Abi's location before it is too late. Looking over her old cases, she realises that former nemesis Peter Baxter may have something to do with Abi's abduction, but in interview, he claims to be totally innocent. When Wallis trips up and mentions one of Abi's nicknames in passing, Nixon realises that Abi's abductor has been under her nose all along. A search of Baxter's industrial unit reveals a series of numbers, which have been graffited on the wall, which provide co-ordinates as to Abi's location. A search of a local container yard finds Abi alive and well, but Nixon is upset to find that her evidence against Wallis has disappeared from his car. (thetvdb.com)