The digital channel will be clearing its schedules from 9.30pm on Easter Saturday, March 22, for Noel Fielding and Julian Barratt.
The documentary which starts the evening promises never-before-seen home movies and photos from the duo, who visit landmark locations from the comedy club where they first performed to the studio-turned-organic-supermarket where the radio show was recorded.
The programme will also feature interviews from Stewart Lee, Lee Mack, Danny Wallace, who produced their radio show, and Steve Coogan, whose production company Baby Cow makes the TV series.
Fielding and Barratt will start the evening with a live link, and later introduce six of their favourite episodes.
