SJAF 4

Episode four of Sarah Jane's Alien Files aired alongside The Empty Planet.

Synopsis
While writing an email to Luke, Sarah Jane Smith discusses family with Mr Smith. This discussion leads to the addition of the Slitheen and Blathereen families, as well as the Blathereen's gift of rakweed, to the Alien Files.

Cast

 * Sarah Jane Smith - Elisabeth Sladen
 * Mr Smith - Alexander Armstrong

Crew

 * Title music - Murray Gold
 * Music - Sam Watts
 * Script consultant - Phil Ford
 * Graphics - BBC Wales Graphics
 * Director of photography - Tim Knight
 * Camera operator - Leon Hoser
 * Sound recordist - Olly Astles-Jones
 * Make-up - Emma Bailey
 * Online editor - Paul Shields
 * Dubbing mixer - Ashley Armstrong
 * Production executive - Dominic Parry
 * Production manager - Jane Jenkins
 * Editor - Ivan Probert
 * For BBC Wales - Brian Minchin, Nikki Wilson
 * Director - Pip Banyard
 * Executive producers - Gillian Scothern, Russell T Davies
 * Series producer - John Piper

Worldbuilding

 * Mr Smith seems grateful for K9 Mark IV's absence, though Sarah Jane declares that K9 is the closest thing Mr Smith has to family.
 * Mr Smith compares the long and bitter feud between the Slitheen and Blathereen to the war between the Sontarans and the Rutan Host, as well as the Last Great Time War.
 * According to Mr Smith, Raxacoricofallapatorius is located in the Isop Galaxy.

Story notes

 * This story contains clips from TV: Revenge of the Slitheen and TV: The Gift.

Continuity

 * Mr Smith mentions the Slitheen family joining into an alliance with other enemies of the Doctor. (TV: The Pandorica Opens)