A list of Appearances by K-9 Mark I.
Television
Doctor Who
Season 15
- The Invisible Enemy (First Appearances, Joins)
- Image of the Fendahl (Brief Cameo)
- The Sun Makers
- Underworld
- The Invasion of Time (Leaves)
Season 21
- Resurrection of the Daleks (Flashback, Archival Material)
Doctor Who Mini-episodes
- Search Out Space (Possible, unknown model K-9)
- Dimensions in Time (Possible; unknown model K-9, story not regarded as canonical)
K-9
- Regeneration (Regenerates)
- The Curse of Anubis (Drawings)
For the Appearances of the Regenerated K-9 Mark I see K9 Mark 2 - List of Appearances
Big Finish Audio Dramas
- Zagreus
- Weapon of Choice
- Square One
- The Inquiry
- A Blind Eye
- Lies
- Spirit
- Pandora
- Insurgency
- Imperiatrix
- Fractures
- Warfare
- Appropriation
- Mindbomb
- Panacea
The Companion Chronicles
Prose stories
Novels
Target Novelisations
- All televised stories adapted
Virgin New Adventures
- Lungbarrow (guest; with K-9 Mark II)
Short stories
Doctor Who Magazine
- Affirmative
- Tautology (K-9 Mark I origin story; does not technically appear)
Decalog 2: Lost Property
Short Trips
- Jealous, Possessive (with K-9 Mark II)