| Sci-fi convention? | 18 |
| Sci-fi conventioneer, perhaps | 29 |
| Sci-fi conventiongoer, stereotypically | 38 |
| Sci-fi council member | 21 |
| Sci-fi counselor played by Marina Sirtis | 40 |
| Sci-fi craft | 12 |
| Sci-fi crafts | 13 |
| Sci-fi creations | 16 |
| Sci-fi creature | 15 |
| Sci-fi creature who sings the song nicknamed "Yub Nub" | 64 |
| Sci-fi creature whose language is based on the Chinese dialect Kalmyk | 69 |
| Sci-fi creatures | 16 |
| Sci-fi creatures: Abbr. | 23 |
| Sci-fi crime lord | 17 |
| Sci-fi danger | 13 |
| Sci-fi debut of 1921 | 20 |
| Sci-fi defense | 14 |
| Sci-fi destination | 18 |
| Sci-fi device | 13 |
| Sci-fi disturbances | 19 |
| Sci-fi doctor | 13 |
| Sci-fi drama on NBC | 19 |
| Sci-fi drama set at an island factory | 37 |
| Sci-fi droid | 12 |
| Sci-fi drug | 11 |
| Sci-fi earthling | 16 |
| Sci-fi effects | 14 |
| Sci-fi empath Deanna | 20 |
| Sci-fi enemy | 12 |
| Sci-fi energy source | 20 |
| Sci-fi escape craft | 19 |
| Sci-fi escape device | 20 |
| Sci-fi escape vehicle | 21 |
| Sci-fi escape vehicles | 22 |
| Sci-fi extra | 12 |
| Sci-fi extras | 13 |
| Sci-fi facility | 15 |
| Sci-fi figure | 13 |
| Sci-fi figures | 14 |
| Sci-fi film extra | 17 |
| Sci-fi film extras | 18 |
| Sci-fi film franchise | 21 |
| Sci-fi film menace of '58 | 29 |
| Sci-fi film of '58, with "The" | 44 |
| Sci-fi film of 1954 | 19 |
| Sci-fi film of 1979 | 19 |
| Sci-fi film of 1982 | 19 |
| Sci-fi film of 1984 | 19 |
| Sci-fi film of Â’98 | 22 |
| Sci-fi film power | 17 |
| Sci-fi film remade in 2001 | 26 |
| Sci-fi film set inside a computer | 33 |
| Sci-fi film staples | 19 |
| Sci-fi film vehicles | 20 |
| Sci-fi film with a gut-busting scene? | 37 |
| Sci-fi film with a hatching egg on its poster | 45 |
| Sci-fi film with a sequel 28 years later | 40 |
| Sci-fi film with an android named Ash | 37 |
| Sci-fi film with the tagline "What will you do with yours?" | 69 |
| Sci-fi films | 12 |
| Sci-fi fleet | 12 |
| Sci-fi flick | 12 |
| Sci-fi flick about celeb hangouts? | 34 |
| Sci-fi flick of '82 | 23 |
| Sci-fi flick, 1982 | 18 |
| Sci-fi flyer | 12 |
| Sci-fi foe | 10 |
| Sci-fi franchise | 16 |
| Sci-fi frontier | 15 |
| Sci-fi fryers, formally? | 24 |
| Sci-fi geek who loves a "Deep Space Nine" alien and a Robin Williams sitcom? | 86 |
| Sci-fi group | 12 |
| Sci-fi gun | 10 |
| Sci-fi guy | 10 |
| Sci-fi guys | 11 |
| Sci-fi heavy | 12 |
| Sci-fi hero | 11 |
| Sci-fi hero born March 22, 2233 | 31 |
| Sci-fi hero created by George Lucas | 35 |
| Sci-fi hero in the 25th century | 31 |
| Sci-fi hero played by Buster Crabbe | 35 |
| Sci-fi hero whose home planet is Corellia | 41 |
| Sci-fi home planet | 18 |
| Sci-fi hominid | 14 |
| Sci-fi horror film: 1979 | 24 |
| Sci-fi hoverer | 14 |
| Sci-fi hoverers | 15 |
| Sci-fi hybrid | 13 |
| Sci-fi invader | 14 |
| Sci-fi invaders | 15 |
| Sci-fi invaders, for short | 26 |
| Sci-fi killer | 13 |
| Sci-fi knight | 13 |
| Sci-fi knights | 14 |
| Sci-fi lab assistant | 20 |
| Sci-fi landing site | 19 |
| Sci-fi landing site, perhaps | 28 |
| Sci-fi landing site, sometimes | 30 |
| Sci-fi leisure class | 20 |
| Sci-fi lip-reader | 17 |