| 1 | 1 | Star Trek - The Next Generation | 1987-1994 | 176 | 60* | synd | |  |  | |
| 3 | 2 | Battlestar Galactica (new) | 2003-X | 58+ | 60 | SciFi/Sky | | | |  |
| 2 | 3 | Stargate SG-1 | 1997-X | 214+ | 60 | Show/SF | | | | |
| 4 | 4 | The X-Files | 1993-2002 | 202 | 60 | Fox | | | | |
| 5 | 5 | Star Trek (Original Series) | 1966-1969 | 79 | 60 | NBC | | | | |
| 7 | 6 | Babylon 5 | 1993-1999 | 115 | 60* | syn/TNT | | | | |
| 6 | 7 | Firefly | 2002 | 15 | 60 | Fox | | | | |
| 8 | 8 | Farscape | 1999-2003 | 88 | 60 | SciFi | | | | |
| 9 | 9 | Star Trek - Deep Space Nine | 1993-1999 | 174 | 60* | synd | | | | |
| 10 | 10 | The Twilight Zone | 1959-1964 | 156 | 30/60 | CBS | | | | |
| 11 | 11 | Star Trek - Voyager | 1995-2001 | 171 | 60* | UPN | | | | |
| 13 | 12 | Stargate - Atlantis | 2004-X | 60+ | 60 | SciFi | | | | |
| 12 | 13 | Futurama | 1999-2003 | 72 | 30 | Fox | | | | |
| 14 | 14 | Doctor Who | 1963-1989 | 694 | 30* | BBC | | | | |
| 17 | 15 | Star Trek - Enterprise | 2001-2005 | 98 | 60 | UPN | | | | |
| 15 | 16 | Lost | 2004-X | 58+ | 60 | ABC | | | | |
| 16 | 17 | Red Dwarf | 1988-1999 | 52 | 30 | BBC | | | | |
| 20 | 18 | The Outer Limits | 1963-1966 | 49 | 60 | ABC | | | | |
| 18 | 19 | Quantum Leap | 1989-1994 | 95 | 60* | NBC | | | | |
| 19 | 20 | Doctor Who (2005) | 2005-X | 29+ | 45 | BBC | | | | |
| 21 | 21 | Battlestar Galactica (original) | 1978-1980 | 34 | 60* | ABC | | | | |
| 22 | 22 | Smallville | 2001-X | 121+ | 60 | WB | | | | |
| 25 | 23 | The Avengers (with Emma Peel) | 1965-1967 | 50 | 60 | ITV | | | | |
| 23 | 24 | Sliders | 1995-2000 | 88 | 60 | Fox/SF | | | | |
| 24 | 25 | V | 1984-1985 | 24 | 60* | NBC | | | | |
| 27 | 26 | Dark Angel | 2000-2002 | 43 | 60 | Fox | | | | |
| 26 | 27 | Hitchhiker's Guide to the Galaxy | 1981 | 6 | 35 | BBC | | | | |
| 28 | 28 | The Prisoner | 1967-1968 | 17 | 60 | ITV | | | | |
| 30 | 29 | Blake's 7 | 1978-1981 | 52 | 60 | BBC | | | | |
| 29 | 30 | Mystery Science Theater 3000 | 1988-1999 | 197 | 90 | Com/SF | | | | |
| 37 | 31 | Voyage to the Bottom of the Sea | 1964-1968 | 110 | 60 | ABC | | | | |
| 31 | 32 | Lost in Space | 1965-1968 | 83 | 60 | CBS | | | | |
| 32 | 33 | Space 1999 | 1975-1977 | 48 | 60 | ITV | | | | |
| 40 | 34 | Time Tunnel | 1966-1967 | 30 | 60 | ABC | | | | |
| 33 | 35 | Space - Above and Beyond | 1995 | 22 | 60 | Fox | | | | |
| 34 | 36 | The 4400 | 2004-X | 32+ | 60 | USA | | | | |
| 35 | 37 | Andromeda | 2000-2005 | 110 | 60 | synd | | | | |
| 39 | 38 | Heroes | 2006 | 23+ | 60 | NBC | | | | |
| 49 | 39 | The Adventures of Superman | 1953-1957 | 104 | 30 | ABC | | | | |
| 52 | 40 | The Invaders | 1967-1968 | 43 | 60 | ABC | | | | |
| 36 | 41 | The Man From U.N.C.L.E. | 1964-1968 | 105 | 60 | NBC | | | | |
| 54 | 42 | My Favorite Martian | 1963-1966 | 107 | 30 | CBS | | | | |
| 38 | 43 | Third Rock From the Sun | 1996-2001 | 139 | 30 | NBC | | | | |
| 42 | 44 | Alien Nation | 1989-1990 | 21 | 60* | Fox | | | | |
| 43 | 45 | Buck Rogers in the 25th Century | 1979-1981 | 33 | 60* | NBC | | | | |
| 41 | 46 | Lois & Clark (New Superman) | 1993-1997 | 88 | 60 | ABC | | | | |
| 44 | 47 | The Six Million Dollar Man | 1973-1978 | 100 | 60* | ABC | | | | |
| 46 | 48 | Max Headroom - The Series | 1987-1988 | 14 | 60* | ABC | | | | |
| 45 | 49 | seaQuest DSV (& 2032) | 1993-1995 | 53 | 60 | NBC | | | | |
| 47 | 50 | Alias | 2001-06 | 105 | 60 | ABC | | | | |
| 48 | 51 | Roswell | 1999-2002 | 61 | 60 | WB/UPN | | | | |
| 51 | 52 | UFO | 1970-1971 | 26 | 60 | ITV | | | | |
| 50 | 53 | Thunderbirds | 1965-1966 | 32 | 60 | ATV | | | | |
| 53 | 54 | The Wild, Wild West | 1965-1969 | 104 | 60 | CBS | | | | |
| 67 | 55 | Science Fiction Theatre | 1955-1957 | 78 | 30 | synd | | | | |
| 56 | 56 | The Outer Limits (new) | 1995-2002 | 154 | 60 | Show/SF | | | | |
| 57 | 57 | Kolchak - The Night Stalker | 1974-1975 | 20 | 60 | ABC | | | | |
| 55 | 58 | Lexx | 1997-2002 | 61 | 90/60 | synd/SF | | | | |
| 58 | 59 | Batman | 1966-1968 | 120 | 30 | ABC | | | | |
| 60 | 60 | Cowboy Bebop | 1998 | 26 | 30 | TV Tokyo | | | | |
| 59 | 61 | ALF | 1986-1990 | 102 | 30 | NBC | | | | |
| 61 | 62 | Crusade | 1999 | 13 | 60 | TNT | | | | |
| 62 | 63 | The Jetsons | 1962-1963 | 24 | 30 | ABC | | | | |
| 63 | 64 | Millennium | 1996-1999 | 67 | 60 | Fox | | | | |
| 64 | 65 | Logan's Run | 1977-1978 | 13 | 60 | CBS | | | | |
| 65 | 66 | Wonder Woman | 1974-1979 | 57 | 60 | ABC/CBS | | | | |
| 66 | 67 | The (New) Twilight Zone | 1985-1987 | 36 | 60/30 | CBS/syn | | | | |
| 78 | 68 | Eureka | 2006-X | 12+ | 60 | SciFi | | | | |
| 73 | 69 | Dune (2000) | 2000 | 3 | 120 | SciFi | | | | |
| 68 | 70 | Adventures of Brisco County Jr | 1993-1994 | 27 | 60/P | Fox | | | | |
| 69 | 71 | Earth - Final Conflict | 1997-2002 | 110 | 60 | synd | | | | |
| 70 | 72 | The Incredible Hulk | 1977-1982 | 79 | 60 | CBS | | | | |
| 74 | 73 | Earth 2 | 1994-1995 | 22 | 60/P | NBC | | | | |
| 71 | 74 | Planet of the Apes | 1974 | 14 | 60 | CBS | | | | |
| 72 | 75 | Mork and Mindy | 1978-1982 | 92 | 30* | ABC | | | | |
| 75 | 76 | Sapphire and Steel | 1979-1982 | 34 | 30 | ATV | | | | |
| 76 | 77 | Amazing Stories | 1985-1987 | 43 | 30* | NBC | | | | |
| 77 | 78 | The Bionic Woman | 1976-1978 | 57 | 60 | ABC/NBC | | | | |
| 79 | 79 | The Greatest American Hero | 1981-1983 | 44 | 60 | ABC | | | | |
| 98 | 80 | The Invisible Man (1950s) | 1958-59 | 26 | 30 | ITV | | | | |
| 80 | 81 | Taken | 2002 | 10 | 120 | SciFi | | | | |
| 81 | 82 | Land of the Giants | 1968-1970 | 51 | 60 | ABC | | | | |
| 82 | 83 | Get Smart | 1965-1969 | 138 | 30 | NBC/CBS | | | | |
| 83 | 84 | Ghost in the Shell: SAC | 2002-04 | 52 | 30 | Prod IG | | | | |
| 85 | 85 | Star Trek (Animated Series) | 1973-1974 | 22 | 30 | NBC | | | | |
| 84 | 86 | The Flash | 1990-1991 | 22 | 60 | CBS | | | | |
| 87 | 87 | Quatermass Serials | 1953-1959 | 18 | 30/35 | BBC | | | | |
| 88 | 88 | Invasion | 2005-06 | 22 | 60 | ABC | | | | |
| 89 | 89 | VR.5 | 1995 | 13 | 60/120 | Fox | | | | |
| 86 | 90 | Captain Scarlet & the Mysterons | 1968 | 32 | 30 | ITV | | | | |
| 90 | 91 | The Invisible Man | 2000-2002 | 46 | 50 | SciFi | | | | |
| 92 | 92 | Neon Genesis Evangelion | 1995-96 | 26 | 30 | Gainax | | | | |
| 91 | 93 | Dark Skies | 1996-1997 | 19 | 60 | NBC | | | | |
| 93 | 94 | Surface | 2005-06 | 15 | 60 | NBC | | | | |
| 95 | 95 | The Tomorrow People | 1973-1979 | 22 | 30 | ITV | | | | |
| 94 | 96 | War of the Worlds | 1988-90 | 41 | 60 | synd | | | | |
| 96 | 97 | Threshold | 2005 | 14 | 60 | CBS | | | | |
| — | 98 | Odyssey 5 | 2002-03 | 20 | 60 | Showtime | | | | |
| 97 | 99 | Æon Flux | 1991-1995 | 16 | 30* | MTV | | | | |
| — | 100 | Eerie, Indiana | 1991 | 19 | 30 | NBC | | | | |
