| David Vincent? (43 episodes 1967-1968) | Roy Thinnes | |
| Introductory Narrator? (43 episodes 1967-1968) | Hank Simms | |
| Narrator (43 episodes 1967-1968) | William Woodson | |
| Edgar Scoville? (13 episodes 1967-1968) | 肯特·史密斯
 | |
| Alien? (4 episodes 1967-1968) | Mark Russell | |
| Alien? (4 episodes 1967) | Robert Dulaine | |
| Michael Tressider? (3 episodes 1967) | 威廉·温德姆
 | |
| Colonel Archie Harmon? (3 episodes 1967-1968) | Lin McCarthy | |
| Mr. Nexus? (3 episodes 1967-1968) | 艾尔弗雷德·赖德
 | |
| Vice Chancellor Pierre Alquist? (3 episodes 1967) | 迈克尔·伦尼
 | |
| Bob Torin? (3 episodes 1967) | 安东尼·埃斯列
 | |
| Ellie Markham? (3 episodes 1967) | Diana Hyland
 | |
| James Boland? (3 episodes 1967-1968) | John Milford | |
| Brother John? (3 episodes 1967-1968) | Richard O'Brien | |
| Dr. Ed Gantley? (3 episodes 1967-1968) | Simon Scott | |
| Air Crash Investigator? (3 episodes 1967-1968) | Byron Keith | |
| Alien Pilot? (3 episodes 1967-1968) | John Ward | |
| Guard? (3 episodes 1967) | Ray Kellogg | |
| Deputy? (3 episodes 1967-1968) | Wayne Heffley | |
| Hotel Detective? (3 episodes 1967-1968) | Ross Elliott | |
