There are no words to describe Dynamo, the street magician from Bradford. Just watch footage of him apparently walking across the Thames. It can't be possible. Yet there he is, making his way towards the Houses of Parliament, in front of hordes of onlookers. His show Magician Impossible is a hit for digital channel Watch so here's hoping the self-effacing Dynamo (aka Steven Frayne) makes the most of a terrestrial audience by having fun with Ross.

Also on the guest bill are comedian Jack Dee, back on the road after a six-year hiatus, and Harry Potter's Emily Watson. Gwen Stefani gets together with old mates No Doubt to provide the music.

Adam Buxton interview

Adam Buxton talks about his new show Bug, making a video for Gwen Stefani's Hollaback Girl and why Joss Stone should be applauded.