Series 4 (SJA)

Series 4 of The Sarah Jane Adventures is expected to air on CBBC or BBC One in the autumn of 2010. According to Doctor Who Magazine, pre-production was under way as early as November 2009. On 4 March 2010, the BBC officially announced that production had been commissioned, with filming expected to begin by the end of March. (The same announcement also confirmed that a 5th series for 2011 had also been commissioned.)

The 4th season will see the return of all the core cast members (though the 4 March 2010 announcement did not indicate whether K9 would appear, K9 was seen on set when filming began) for a 12-episode series. It has been confirmed that Luke Smith would be only appearing in the first episode of series 4.

For the new series, Brian Minchin joins as producer, with Phil Ford as co-producer. Russell T Davies remains as executive producer along with Nikki Wilson.

Primary cast

 * Sarah Jane Smith - Elisabeth Sladen
 * Luke Smith - Tommy Knight (Due to only appear in The Nightmare Man)
 * Rani Chandra - Anjli Mohindra
 * Clyde Langer - Daniel Anthony
 * Mr. Smith - Alexander Armstrong
 * K9 Mark IV - John Leeson (seen on set)

Guest cast

 * Eleventh Doctor - Matt Smith
 * Jo Grant - Katy Manning
 * Celeste Rivers - Floella Benjamin
 * Nightmare Man - Julian Bleach
 * Herself - Lucie Jones
 * Tia Karim - Laila Rouass
 * Ocean Waters - Cheryl Campbell
 * Gavin - Joe Mason
 * Mysterious Shopkeeper - Cyril Nri
 * Ruby White - Julie Graham
 * Santiango Jones- Finn Jones

Aliens and enemies

 * Nightmare Man (DWM Issue 419)
 * Shansheeth (DWM Issue 419)
 * Androvax
 * Slitheen
 * Blathereen
 * Alliance of Shades (DWM Issue 423)

Television stories
The Titles and writers of this season's episodes were revealed in Doctor Who Magazine. All of Series 4 episodes will be 2 parts.

Rumours

 * Gareth Roberts may write an hour long special.
 * On-set videos show Luke saying goodbye to Sarah Jane and the rest of the cast, making it likely that he will leave in this series to be replaced by the new character of Series 5. This may also suggest that a plot for an episode will be Luke leaving but is somehow returned to Sarah Jane. This would be the more logical explanation since he is her "son".
 * The Nightmare Man will have a big impact on Luke's life.