| 1 | 1 | Star Trek - The Next Generation | 1987-1994 | 176 | 60* | synd | |  |  |  |
| 2 | 2 | Battlestar Galactica (new) | 2003-X | 75+ | 60 | SciFi/Sky | | | | |
| 3 | 3 | Stargate SG-1 | 1997-2007 | 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 | | | | |
| 6 | 6 | Babylon 5 | 1993-1999 | 115 | 60* | syn/TNT | | | | |
| 7 | 7 | The Twilight Zone | 1959-1964 | 156 | 30/60 | CBS | | | | |
| 8 | 8 | Firefly | 2002 | 15 | 60 | Fox | | | | |
| 9 | 9 | Farscape | 1999-2003 | 88 | 60 | SciFi | | | | |
| 10 | 10 | Star Trek - Deep Space Nine | 1993-1999 | 174 | 60* | synd | | | | |
| 11 | 11 | Stargate - Atlantis | 2004-2009 | 100 | 60 | SciFi | | | | |
| 12 | 12 | The Outer Limits | 1963-1966 | 49 | 60 | ABC | | | | |
| 13 | 13 | Star Trek - Voyager | 1995-2001 | 171 | 60* | UPN | | | | |
| 14 | 14 | Futurama | 1999-2003 | 72 | 30 | Fox | | | | |
| 16 | 15 | Doctor Who (2005) | 2005-X | 56+ | 45 | BBC | | | | |
| 15 | 16 | Doctor Who | 1963-1989 | 694 | 30* | BBC | | | | |
| 17 | 17 | The Avengers (with Emma Peel) | 1965-1967 | 50 | 60 | ITV | | | | |
| 18 | 18 | Lost | 2004-X | 95+ | 60 | ABC | | | | |
| 19 | 19 | Star Trek - Enterprise | 2001-2005 | 98 | 60 | UPN | | | | |
| 22 | 20 | Voyage to the Bottom of the Sea | 1964-1968 | 110 | 60 | ABC | | | | |
| 20 | 21 | Red Dwarf | 1988-1999 | 52 | 30 | BBC | | | | |
| 23 | 22 | Time Tunnel | 1966-1967 | 30 | 60 | ABC | | | | |
| 21 | 23 | Quantum Leap | 1989-1994 | 95 | 60* | NBC | | | | |
| 24 | 24 | The Invaders | 1967-1968 | 43 | 60 | ABC | | | | |
| 25 | 25 | The Adventures of Superman | 1953-1957 | 104 | 30 | ABC | | | | |
| 26 | 26 | My Favorite Martian | 1963-1966 | 107 | 30 | CBS | | | | |
| 28 | 27 | Science Fiction Theatre | 1955-1957 | 78 | 30 | synd | | | | |
| 29 | 28 | Heroes | 2006 | 53+ | 60 | NBC | | | | |
| 27 | 29 | Battlestar Galactica (original) | 1978-1980 | 34 | 60* | ABC | | | | |
| 30 | 30 | Sliders | 1995-2000 | 88 | 60 | Fox/SF | | | | |
| 33 | 31 | The Invisible Man (1950s) | 1958-59 | 26 | 30 | ITV | | | | |
| 31 | 32 | Smallville | 2001-X | 165+ | 60 | WB | | | | |
| 32 | 33 | V | 1984-1985 | 24 | 60* | NBC | | | | |
| 35 | 34 | Hitchhiker's Guide to the Galaxy | 1981 | 6 | 35 | BBC | | | | |
| 34 | 35 | Dark Angel | 2000-2002 | 43 | 60 | Fox | | | | |
| 36 | 36 | Mystery Science Theater 3000 | 1988-1999 | 197 | 90 | Com/SF | | | | |
| 38 | 37 | Andromeda | 2000-2005 | 110 | 60 | synd | | | | |
| 37 | 38 | The Prisoner | 1967-1968 | 17 | 60 | ITV | | | | |
| 39 | 39 | The 4400 | 2004-2007 | 45 | 60 | USA | | | | |
| 40 | 40 | Blake's 7 | 1978-1981 | 52 | 60 | BBC | | | | |
| 41 | 41 | Space - Above and Beyond | 1995 | 22 | 60 | Fox | | | | |
| 43 | 42 | Space 1999 | 1975-1977 | 48 | 60 | ITV | | | | |
| 42 | 43 | Lost in Space | 1965-1968 | 83 | 60 | CBS | | | | |
| 52 | 44 | Eureka | 2006-X | 33+ | 60 | SciFi | | | | |
| 44 | 45 | Buck Rogers in the 25th Century | 1979-1981 | 33 | 60* | NBC | | | | |
| 46 | 46 | Third Rock From the Sun | 1996-2001 | 139 | 30 | NBC | | | | |
| 48 | 47 | Alias | 2001-06 | 105 | 60 | ABC | | | | |
| 47 | 48 | Alien Nation | 1989-1990 | 21 | 60* | Fox | | | | |
| 45 | 49 | The Man From U.N.C.L.E. | 1964-1968 | 105 | 60 | NBC | | | | |
| 50 | 50 | The Outer Limits (new) | 1995-2002 | 154 | 60 | Show/SF | | | | |
| 54 | 51 | Cowboy Bebop | 1998 | 26 | 30 | TV Tokyo | | | | |
| 49 | 52 | Lois & Clark (New Superman) | 1993-1997 | 88 | 60 | ABC | | | | |
| 57 | 53 | Dune (2000) | 2000 | 3 | 120 | SciFi | | | | |
| 51 | 54 | Roswell | 1999-2002 | 61 | 60 | WB/UPN | | | | |
| 53 | 55 | Max Headroom - The Series | 1987-1988 | 14 | 60* | ABC | | | | |
| 55 | 56 | seaQuest DSV (& 2032) | 1993-1995 | 53 | 60 | NBC | | | | |
| 59 | 57 | Lexx | 1997-2002 | 61 | 90/60 | synd/SF | | | | |
| 56 | 58 | The Six Million Dollar Man | 1973-1978 | 100 | 60* | ABC | | | | |
| 60 | 59 | UFO | 1970-1971 | 26 | 60 | ITV | | | | |
| 61 | 60 | The Wild, Wild West | 1965-1969 | 104 | 60 | CBS | | | | |
| 58 | 61 | Thunderbirds | 1965-1966 | 32 | 60 | ATV | | | | |
| 62 | 62 | Kolchak - The Night Stalker | 1974-1975 | 20 | 60 | ABC | | | | |
| 73 | 63 | Terminator (Sarah Connor) | 2008-X | 22+ | 60 | Fox | | | | |
| 77 | 64 | Torchwood | 2006-X | 26+ | 50 | BBC | | | | |
| 63 | 65 | ALF | 1986-1990 | 102 | 30 | NBC | | | | |
| 65 | 66 | Batman | 1966-1968 | 120 | 30 | ABC | | | | |
| 64 | 67 | Crusade | 1999 | 13 | 60 | TNT | | | | |
| 67 | 68 | Earth 2 | 1994-1995 | 22 | 60/P | NBC | | | | |
| 66 | 69 | The Jetsons | 1962-1963 | 24 | 30 | ABC | | | | |
| 68 | 70 | Millennium | 1996-1999 | 67 | 60 | Fox | | | | |
| 70 | 71 | Logan's Run | 1977-1978 | 13 | 60 | CBS | | | | |
| 69 | 72 | The (New) Twilight Zone | 1985-1987 | 36 | 60/30 | CBS/syn | | | | |
| 72 | 73 | Adventures of Brisco County Jr | 1993-1994 | 27 | 60/P | Fox | | | | |
| 75 | 74 | Get Smart | 1965-1969 | 138 | 30 | NBC/CBS | | | | |
| 71 | 75 | Wonder Woman | 1974-1979 | 57 | 60 | ABC/CBS | | | | |
| 76 | 76 | Ghost in the Shell: SAC | 2002-04 | 52 | 30 | Prod IG | | | | |
| 79 | 77 | Æon Flux | 1991-1995 | 16 | 30* | MTV | | | | |
| 78 | 78 | Neon Genesis Evangelion | 1995-96 | 26 | 30 | Gainax | | | | |
| 80 | 79 | Taken | 2002 | 10 | 120 | SciFi | | | | |
| 74 | 80 | Earth - Final Conflict | 1997-2002 | 110 | 60 | synd | | | | |
| 81 | 81 | 7 Days | 1998-2001 | 66 | 60 | UPN | | | | |
| 82 | 82 | Planet of the Apes | 1974 | 14 | 60 | CBS | | | | |
| 83 | 83 | Mork and Mindy | 1978-1982 | 92 | 30* | ABC | | | | |
| 84 | 84 | The Greatest American Hero | 1981-1983 | 44 | 60 | ABC | | | | |
| 85 | 85 | Airwolf | 1984-87 | 80 | 60 | CBS | | | | |
| 87 | 86 | Star Trek (Animated Series) | 1973-1974 | 22 | 30 | NBC | | | | |
| 86 | 87 | The Incredible Hulk | 1977-1982 | 79 | 60 | CBS | | | | |
| 89 | 88 | Invasion | 2005-06 | 22 | 60 | ABC | | | | |
| 88 | 89 | War of the Worlds | 1988-90 | 41 | 60 | synd | | | | |
| 91 | 90 | Jeremiah | 2002-2004 | 34 | 50 | Show | | | | |
| 97 | 91 | Knight Rider | 1982-86 | 90 | 60 | NBC | | | | |
| 90 | 92 | The Invisible Man | 2000-2002 | 46 | 50 | SciFi | | | | |
| 95 | 93 | The Day of the Triffids | 1981 | 6 | 30 | BBC | | | | |
| 92 | 94 | Amazing Stories | 1985-1987 | 43 | 30* | NBC | | | | |
| 96 | 95 | Sapphire and Steel | 1979-1982 | 34 | 30 | ATV | | | | |
| 93 | 96 | Total Recall - 2070 | 1999 | 22 | 60 | TVO | | | | |
| 94 | 97 | Captain Scarlet & the Mysterons | 1968 | 32 | 30 | ITV | | | | |
| — | 98 | Surface | 2005-2006 | 15 | 60 | NBC | | | | |
| 98 | 99 | The Lone Gunmen | 2001 | 13 | 60 | Fox | | | | |
| 100 | 100 | The Bionic Woman | 1976-1978 | 57 | 60 | ABC/NBC | | | | |
