You don’t realize how much work goes into creating the greatest science fiction and fantasy series until you see all the mistakes that were made along the way. Blooper reels are a hilarious, brilliant way to celebrate the artistry of making great stories. Here are some of our favorites.

Star Trek: The Next Generation (1987-1994)

X-Files (1993-2002)

Firefly (2002-2003)

Battlestar Galactica (2004-2009)

Smallville (2001-2011)

Doctor Who (1963-1989; 2005-)

Star Trek: The Original Series (1966-1969)

Under the Dome (2013-)

Torchwood (2006-2011)

Lost (2004-2010)

Fringe (2008-2013)