|Planet of Origin:||Earth|
|Original era:||20th Century|
|First Appearance:||Oddly Out of Place|
|Last Appearance:||The Triplicate Catastrophe|
|Portrayed By:||Hugh Laurie|
Thorough Visor was played by British actor Hugh Laurie. He was an associate of the Fourth and Fifth Inspectors. While at first it appeared that he was an alien, it was eventually revealed that he was from an extremely eccentric 20th century Earth-human family and that he was an unwitting pawn in the battle between the Blue and Orange Wardens. He was a pleasant, well-meaning and seemingly not very bright individual, known for his penchant for wearing extremely short shorts. His travels with the Inspector revealed to all, including himself, that he was far more capable than realized.
Following the Fifth Inspector's regeneration, he chose to remain on the distant-future Earth colony of Androgyny.
- Laurie cheerfully commented about appearing on the programme in an Inspector Spacetime Monthly interview: "A chap could do a lot worse than spend three years crammed in a phone box with Karen, Pauline and Lynda!"
- While Thorough Visor's farewell scene was spliced into the start of the episode "The Triplicate Catastrophe", it had been filmed along with the rest of the previous episode, "The Hills of Androgyny".
- Laurie returned to the series as a guest star in the new-era episode "Fry and Laurie", but rather than playing Thorough Visor, he appeared as a parody version of himself, along with his long-time comedy partner Stephen Fry.