The list is absolute garbage, most of those don't even count as sci-fi
25. V: the Miniseries (1984)
24. Galaxy Quest (1999)
23. Dr. Who (1963-Present)
22. Quantum Leap (1989-1993) Might count as sci-fi but not top 25
21. Futurama (1999-2003)
20. Star Wars: Clone Wars (2003-2005) nice cartoon but SW isn't sci-fi
19. Starship Troopers (1997) sci-fi but not top 25
18. Heroes (2006-Present) not even sf
17. Eternal Sunshine of the Spotless Mind (2004) garbage though it can count as sci-fi due to themes
16. Total Recall (1990)
15. Firefly / Serenity (2002/2005)
14. Children of Men (2006) doesn't even count as sci-fi and garbage on top of it
13. The Terminator / Terminator 2 (1984 /1991)
12. Back to the Future (1985) not sci-fi
11. Lost (2004-Present) not sci-fi plus a contemptable story
10. The Thing (1982)
09. Aliens (1986)
08. Star Trek: The Next Generation (1987-1994) if any ST gets in it should be DS9 even though I'm tempted to throw it into the sci-fantasy category with SW and WH40K
07. E.T. (1982) not sci-fi and complete drivel on top of it
06. Brazil (1985) not really sci-fi and not very good either
05. Star Trek II: The Wrath of Khan (1982) see next generation above
04. X-Files (1993-2002) this had as much to do with the occult and supernatural as sci-fi if not more. Good but not sure it should be on THIS list
03. Blade Runner (1982)
02. Battlestar Galactica (2003-Present) it's sci-fi but if it shows up on this list at all it should be much lower
01. The Matrix (1999)
Where's are the greats of sci-fi?
B5
Red Dwarf
Gattica
Iron Giant (not great but could find a spot)
Farscape
I'm not even sure there have been enough actual sci-fi movies and series in the last twenty-five years to make for much competition in the top 25. Even though it's my favorite genre I have a hard time populating the list without dipping into the very mediocre.