- You may be looking for the recurring PROBE character.
Andrew Williams was an electrician credited on the following Doctor Who and Class stories:
- Arachnids in the UK
- The Battle of Ranskoor Av Kolos
- Before the Flood
- Brave-ish Heart
- Co-Owner of a Lonely Heart
- The Coach with the Dragon Tattoo
- The Day of the Doctor
- Demons of the Punjab
- Detained
- The Doctor Falls
- The Eaters of Light
- Empress of Mars
- Extremis
- Face the Raven
- For Tonight We Might Die
- The Ghost Monument
- The Girl Who Died
- Hell Bent
- It Takes You Away
- Kerblam!
- Last Christmas
- The Lie of the Land
- The Lost
- The Magician's Apprentice
- The Metaphysical Engine, or What Quill Did
- Nightvisiting
- Orphan 55
- Oxygen
- The Pyramid at the End of the World
- Resolution
- The Return of Doctor Mysterio
- Rosa
- Spyfall
- The Time of the Doctor
- The Tsuranga Conundrum
- Under the Lake
- The Witch's Familiar
- The Witchfinders
- The Woman Who Fell to Earth
- The Zygon Invasion
- The Zygon Inversion