- You may be looking for Chris Thomas, the writer.
Christopher J Thomas, also credited as Chris Thomas, was an assistant director and 3rd assistant director for Doctor Who.
Credits
Assistant director
- Before the Flood
- The Caretaker
- Dark Water
- Death in Heaven
- Deep Breath
- Face the Raven
- The Girl Who Died
- Heaven Sent
- Hell Bent
- The Husbands of River Song
- In the Forest of the Night
- Into the Dalek
- Kill the Moon
- Last Christmas
- Listen
- The Magician's Apprentice
- Mummy on the Orient Express
- Robot of Sherwood
- Sleep No More
- Time Heist
- Under the Lake
- The Witch's Familiar
- The Zygon Invasion
- The Zygon Inversion
3rd assistant director
- Arachnids in the UK
- The Battle of Ranskoor Av Kolos
- Demons of the Punjab
- The Doctor Falls
- The Eaters of Light
- Empress of Mars
- Extremis
- The Ghost Monument
- It Takes You Away
- Kerblam!
- Knock Knock
- The Lie of the Land
- Oxygen
- The Pilot
- The Pyramid at the End of the World
- Resolution
- The Return of Doctor Mysterio
- Rosa
- Smile
- Thin Ice
- The Tsuranga Conundrum
- Twice Upon a Time
- The Witchfinders
- The Woman Who Fell to Earth