In brief: Tennant gives up Dr Who

David Tennant (pictured) is to stand down as Doctor Who after four special episodes are broadcast next year. James Nesbitt has been mentioned as the actor in the frame to become the 11th timelord…………. The Jackson Five, the group that launched the career of pop superstar Michael Jackson, are planning to reunite for a world tour next year. Jermaine Jackson said his siblings, including Michael and Janet, would take part………… The film version of Mamma Mia!, the musical inspired by the Swedish pop band Abba, has become the highest grossing British film of all time, making close to £67m at the UK box office ………….The comic actor Alexander Armstrong has pulled out of becoming the new presenter of Channel 4's Countdown. He reportedly withdrew days after looking embarrassed when mocked about his new job on BBC1's satirical show, Have I Got News for You………….