Series 3 (SJA)

The third series of The Sarah Jane Adventures aired on CBBC and BBC One in autumn 2009. The series consisted of six stories of two episodes each.

In a change of broadcast format, two episodes aired each week, on Thursday and Friday, meaning the entire series aired over a six-week period, with a complete storyline told each week.

A slight change to the opening was made: Before the title sequence, Clyde would narrate the basic premise of the series over a montage of scenes.

Among notable appearances this series, K9 Mark IV appeared in six of the twelve episodes and David Tennant appeared as the Tenth Doctor in the two-part story The Wedding of Sarah Jane Smith which aired in late October.

Thanks in part to Tennant's appearance, the series scored higher-than-average ratings for children's programming, and also consistently scored high Appreciation Index ratings from viewers.

Recurring

 * Sarah Jane Smith - Elisabeth Sladen UsjaS3Promos-0001.jpg
 * Luke Smith - Tommy Knight (exc. The Eternity Trap)
 * Clyde Langer - Daniel Anthony
 * Rani Chandra - Anjli Mohindra
 * Mr Smith - Alexander Armstrong (voice)
 * K9 - John Leeson (voice)
 * Haresh Chandra - Ace Bhatti
 * Gita Chandra - Mina Anwar
 * Professor Celeste Rivers - Floella Benjamin

Guest

 * Tenth Doctor - David Tennant
 * Peter Dalton - Nigel Havers
 * Harry - Brian Miller
 * Adam Lloyd - Gregg Sulkin
 * Samuel Lloyd - Toby Parkes
 * Rani Chandra (older version) - Souad Faress
 * Eve - Eleanor Tomlinson
 * Registrar - Zienia Merton
 * Toby Silverman - Adam Gillen
 * Erasmus Darkening - Donald Sumpter
 * Mona Lisa - Suranne Jones
 * Lionel Harding - Jeff Rawle
 * Phyllis Trupp - Liza Sadovy
 * Tree Blathereen - Miriam Margolyes
 * Leef Blathereen - Simon Callow

Aliens and enemies

 * Judoon
 * Captain Tybo
 * Androvax
 * Nanoforms
 * Eve
 * Adam
 * Ship
 * Travist Polong
 * The Trickster
 * Erasmus Darkening
 * Mona Lisa
 * Highwayman
 * The Abomination
 * Slitheen family
 * Blathereen family

Audiobooks

 * The Shadow People
 * The White Wolf

Novels
The only story of this series to be directly novelised was The Wedding of Sarah Jane Smith. Additionally, Prisoner of the Judoon was adapted as The Sarah Jane Adventures: Judoon Afternoon, The Eternity Trap was adapted as The Sarah Jane Adventures: The Haunted House, Mona Lisa's Revenge was adapted as The Sarah Jane Adventures: Painting Peril and The Gift was adapted as The Sarah Jane Adventures: Blathereen Dream.

Home video releases
The Complete Third Series boxset was released on BBC DVD on 1 November 2010.