Multiple spoilers!!! (Highlight to read).
There's a version of T2 often shown on British TV that includes the
"opening up Arnie's head" scene, and the
Michael Biehn dream sequence, but rather oddly cuts some of the stuff between
Sarah and the perverted orderly, especially the bit where
she hits him repeatedly with the mop handle.
One of the most heavily-cut movies of all time is... wait for it... that well-known video nasty(!) the original live-action version of "Teenage Mutant Ninja Turtles". One of the turtles uses a nunchako (sp?) as a weapon - two lengths of wood joined by a chain. At the time the BBFC had a policy of not allowing use of this weapon in
any PG-rated film, so something like 7 minutes was cut out of it, and 3 or 4 minutes of alternative footage inserted.
TV versions of films always irritate the hell out of me. Crocodile Dundee is a prime example - cut for drugs and suggestive comments by hookers. There was a TV version of "Ghostbusters" that did the rounds too, with much of the "naughty" language removed. (The scene where the EPA guy is referred to as "d*ckless", for example, is completely rewritten. "Well, he's definitely some kind of a rodent...").
The rape scene in "Deathwish 2" was, I believe, not even allowed in British cinemas without heavy cuts, never mind the TV version.
And Bond films are often cut to shreds on TV. The scene where Roger Moore
uses a cigar and can of aftershave as an impromptu flame-thrower is often cut from "Live And Let Die", for example, in a way that causes that section of the film to make absolutely no sense at all.
And they cut a lot of stuff out of "The Golden Voyage Of Sinbad" the last time I saw it (for no apparent reason).
Tom Baker rules!