Past stars of Doctor Who including Sylvester McCoy and Bernard Cribbins are to brave a special edition of quiz show Pointless Celebrities.
They will take part in a themed edition of the show in the 50th anniversary year of the family sci-fi show.
Robot sidekick K9 will also appear on the show as an assistant to Richard Osman, the Pointless keeper of facts and figures.
Bernard Cribbins who played Wilfred Mott in the BBC One drama will be paired with Jacqueline King, his on-screen daughter Sylvia Noble, while Sylvester McCoy - the seventh Doctor - will be reunited with Sophie Aldred, who played his assistant Ace.
Other contestants will be Nicola Bryant, who played assistant Peri, partnering Andrew Hayden Smith, freedom fighter Jake Simmons, and Louise Jameson, who played leather-clad Leela, teaming up with Frazer Hines, the Doctor's 1960s companion Jamie McCrimmon.
The programme - in which contestants have to find the most obscure answers to general knowledge questions - will be hosted as usual by Alexander Armstrong and screened on BBC One on Saturday March 23.