Captain Black engineers the death of chief test pilot Major Gravener, who is retrometabolised as a Mysteron agent as part of the Mysterons' plan to destroy the World Capital, Futura City.
| Title | Captain Scarlet and the Mysterons - Season 1 Episode 21 Treble Cross |
|---|---|
| Year | 1968 |
| Genre | Action & Adventure, Animation, Sci-Fi & Fantasy |
| Country | United Kingdom, United States of America |
| Studio | Associated Television |
| Cast | Francis Matthews, Ed Bishop, Donald Gray, Cy Grant |
| Crew | Gerry Anderson (Executive Producer), John Read (Associate Producer), Barry Gray (Music) |
| Alternative Titles | |
| Keyword | puppetry, alien invasion, martians |
| First Air Date | Sep 29, 1967 |
| Last Air date | May 14, 1968 |
| Season | 1 Season |
| Episode | 32 Episode |
| Runtime | 30:25 minutes |
| Quality | HD |
| IMDb: | 7.30/ 10 by 23.00 users |
| Popularity | 16.393 |
| Language | English |
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