Guests on today's 100th edition of the children's entertainment show include tennis ace Tim Henman , pop star Sting, . and girl group Eternal. Trev and Simon embark on another Transmission Impossible, Dannii Minogue presents this week's Electric Circus, and Toby Anstis visits CBBC's Big Bash in Birmingham. More teenage problems are solved in Clarissa Explains It All, plus cartoon action with Spiderman and the Rugrats. With Zoe Ball and Jamie Theakston.

Today's guests include pop group Boyzone and Coronation Street's Liz Dawn - alias Vera Duckworth. Trev and Simon embark on another Transmission Impossible and Dannii Minogue presents Electric Circus. Plus another episode of Clarissa Explains It All, and cartoon action with Spiderman and today's special double bill of Rugrats. With Zoe Ball and Jamie Theakston.