Mastermind
Sentient computer, Marvel
- Also known as Jeeves
Sentient computer that was first introduced in Captain Britain (Marvel UK, 1976 series) #12. It continued to grow and to evolve.
Appearances
- Captain Britain #12 — 1976-12-29
- Captain Britain #13 — 1977-01-05
- Captain Britain #14 — 1977-01-12
- Captain Britain #15 — 1977-01-19
- The Daredevils #2 — 1983-02-00
- The Mighty World of Marvel #16 — 1984-09-00
- Captain Britain #1 — 1985-01-00
- Captain Britain #7 — 1985-07-00
- Captain Britain #8 — 1985-08-00
- Captain Britain #9 — 1985-09-00
- Captain Britain #11 — 1985-11-00
- Captain Britain #12 — 1985-12-00
- Captain Britain #13 — 1986-01-00
- Captain Britain #14 — 1986-02-00
- Captain Britain #[nn] — 1988-11-17
- X-Men Archives Featuring Captain Britain #3 — 1995-09-00
- Excalibur #3 — 2001-04-00
- Excalibur #4 — 2001-05-00
- Captain Britain Omnibus #[nn] — 2021-00-00