Sherlock's nemesis Moriarty - actor Andrew Scott - joins Matt and Alex along with Patrick Kielty and Amy Williams from Sport Relief's Clash of the Titans. In honour of Andrew's new film The Stag, there's also a stag do throughout the show with embarrassing challenges for the groom.
Plus, Elton John celebrates the album, and outfits, that made him famous, Ann Widdecombe and Vicky Pryce discuss whether women should be treated more leniently by the prison system, Anita Rani has a look at the military hardware kept at British bases, and three viewers remember their childhoods spent during the miners' strikes.
Also on the show, Miranda Krestovnikoff sets up a secret hide to film urban polecats, and John Sergeant visits a shoe factory that was on its last legs until a local businessman stepped in.