Host Rob Brydon and team captains Lee Mack and David Mitchell are joined by guests Tom Allen, Sarah Greene, Ugo Monye and Morgana Robinson.
On Telos the Doctor is reintroduced to the Cyber Leader and meets the Cryons, the planet's original inhabitants who want their planet back and will go to any lengths to do so.
The show in which five super-brain quiz champions, or Eggheads, are put together in one team, and pitted against a team of celebrity quiz players to answer general knowledge questions. Can anyone beat the ultimate champions?
