The comedian raises awareness for Stand Up to Cancer and Cancer Research UK's joint national fundraising campaign, which last year raised over £15.5million. Helping him are Great British Bake Off co-host Sue Perkins and This Is England '90 star Thomas Turgoose, who returns to honour his bet from an earlier show to have Alan's name tattooed on his bottom if £5,000 can be raised for SU2C. Plus, 5 Seconds of Summer perform their new single Hey Everybody!