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.
- 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
- 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 that between the Sontarans and the Rutan Host, as well as that between the Time Lords and the Daleks.
- According to Mr Smith Raxacoricofallapatorius is located in the Isop Galaxy.
- Luke Smith is away at University, where he went in TV: The Nightmare Man.
- Sarah recounts the circumstances in TV: Revenge of the Slitheen which led to Clyde Langer's joining the Bannerman Road gang.