Quote Originally Posted by Dire_Flumph View Post
While a trope of the series, it doesn't happen that often. I'd like to expand it to something like Didn't Spring for the Extended Warranty, covering where 24th century tech gets inexplicably unreliable so the story can happen (transporters can't solve the problem of the week because of ionizing thingy, phasers that can vaporize steel don't bother the alien of the week, none of the ships controls work, "Hey, did that guy just beam through the shields?", and of course, holodeck safeties fail and the holograms try to kill everyone)
I think there's about one a season going from TNG and onward into the spin-offs. Though early on there were more as the Holodeck was a novel concept, and now they didn't have to find insane counter-part Earths like in TOS.

There was also The Royal - I think it was called - which was a Holodeck Malfunction story even if it was an inexplicable alien simulation of a cheesy novel and not on the actual Holodeck.