The UFC started and ended tonight's FOX event with fights getting cut off at the turn of the hour. On Facebook, the Simeon Thoresen vs. David Mitchell fight was cut off at 5 PM ET, which was the time FX was supposed to go live with the other 6 prelims. In tonight's main event between Demetrious Johnson and John Dodson, at least one FOX affiliate apparently switched off the UFC broadcast to go into the 10 PM ET rerun of an episode of "The Big Bang Theory". Here are some tweets from disgruntled viewers.

UFC on fox shut off in the middle of a great main event fight, and turned to the Big Bang theory, Gf reacted by saying hey turn that up #omg — Jonathan Cymek (@JonCymek) January 27, 2013

Thanks for the free #UFC @danawhite. Sadly, Canadians are now watching Penny and Leonard fighting on Big Bang Theory. #FOX #FAIL — Adam Kania (@ackania) January 27, 2013

Fox rules! Round four of a close championship fight and they cut to regular scheduled programming of a repeat of Big Bang Theory. #UFC — Trevor Miller (@_TrevMiller) January 27, 2013

I love The Big Bang Theory but this is not the time! #UFConFox6 #UFC — Sean Bio (@Sean_Bio) January 27, 2013

Big Bang Theory is a CBS show so I'd like to know which Fox AFFILIATES cut off the @ufc main event. @mmasupremacy — Rich Hansen (@MMATorchRich) January 27, 2013

@ufconfox @danawhite @ufc Fox Canada on Rogers cuts to Big Bang theory mid way through main event and doesn't come back till last minute. — Josh (@JoshFightfan27) January 27, 2013

The only confirmed FOX affiliate to leave the main event early was WUTV in Buffalo, New York. If you were affected by this surprise switcheroo, please state so in the comments. Viewers missed the last two rounds of the fight, which essentially saw Johnson come back and win the fight.

SBN coverage of UFC on Fox: Johnson vs. Dodson