Jonny Sweet pretends to be a careers advisor and, without any preparation, must deliver some dubious tips to a group of jobseekers. Meanwhile, Matthew Crosby takes on the role of leading environmentalist Julian Glacier and, with no time to prepare, has to deliver a made-up, on-the-spot lecture to a group of budding planet-savers.
BBC Switch presenter Tom Deacon takes on the role of Mitch Mitchelson, Britain's youngest top level operative in CSI, while Rhys Thomas dons a silver jumpsuit to become Spin Jackson, music media mogul.
The Inbetweeners star Joe Thomas becomes Zack Dashwood, a representative for the 2012 Olympics, with a mission to persuade his sports-mad audience to sign up for brand-new event 'Ballfinger'. Meanwhile, comedian Charlie Skelton is Heinrich Bloom, a European teen driving guru trying to convince a group of learner drivers that he is their passport to success in passing their driving test.
Performer Jonny Sweet becomes Barry Balmoral, a minor member of the royal family claiming to be 37th in line to the throne. Meanwhile, comedian Andrew Spiers takes on the role of top astronaut Snap Wiffersley, with a mission to convince a room of sci-fi fans that he is Britain's number one spaceman.
Comedian Rhys Thomas takes on the role of TV survival expert Griff Griffin. Meanwhile, comedian Holly Walsh becomes police officer PC Gonmad and is asked to explain some totally outrageous changes to the law.
Charlie Skelton becomes Giles Simpson, an inspirational sports lifecoach with a mission to motivate an unsuspecting netball team. Meanwhile, comedian Elliott Tiney takes on the role of young entrepreneur Nicky Dickerson and attempts to convince a group of budding tycoons that he is Britain's third youngest self-made millionaire.