The Sarah Jane Adventures
Cast Roles: J
- Jackson, Alan (3 episodes, e.g. Joseph Millson in The Mark of the Berserker: Episode Two)
- Jackson, Chrissie (11 episodes, e.g. Juliet Cowan in Invasion of the Bane)
- Jackson, Maria (15 episodes, e.g. Yasmin Paige in Invasion of the Bane)
- Jacob (Perry Millward in The Mark of the Berserker: Episode One)
- Janine (2 episodes, e.g. Imogen Bain in Revenge of the Slitheen: Part One)
- Janine (Slitheen) (2 episodes, e.g. Paul Kasey in Revenge of the Slitheen: Part One)
- Jay (Slitheen) (2 episodes, e.g. Paul Kasey in The Lost Boy: Part Two)
- Jeffery (Slitheen) (2 episodes, e.g. Paul Kasey in Revenge of the Slitheen: Part Two)
- Jeffery, Tim (2 episodes, e.g. Ian Midlane in Revenge of the Slitheen: Part Two)
- Jen (2 episodes, e.g. Nadiyah Davis in Warriors of Kudlak: Part One)
- Jerome (Miss) (2 episodes, e.g. Sarah Paul in The Gift: Episode One)
- Jones, Santiago (2 episodes, e.g. Finn Jones in Death of the Doctor: Episode Two)
- Julie (Scarlett Murphy in Prisoner of the Judoon: Episode One)