It is Richard Dean Anderson, and his character is Colonel O'neil. AFAIK he is alive and well in RL. The series is awesome! I never miss an episode. I have not seen the movie, and was not even aware there was a movie... Some fan I am, eh?
I really love the series... Unfortunately, they have stopped airing it here after reaching season...3? where Appophis has just hyperspace jumped out of a minefield, and is about to die by the replicators. O'niel and the rest are on a hijacked pyramid ship. lol
Anyways, i think the series rocks way more than the movie.
Man too bad I've never seen any episodes of McGuyver, but I do try to watch it(Stargate) when i can but it only plays on saturdays and often I'm not around to see it, so I'm missing a lot of plot line from the more recent seasons.
my partner is a huge fan - she DLs all the new episodes as there air in Europe as we don't have cable. I bought her the S1 box set for X-mas and have started watching it. It's pretty good, but the 'planet/alien of the week' style reminds me too much of Star Trek:TNG. not that that's a bad thing (as I'm a die hard Trekkie) but I was hoping for something more.
I enjoy the movie (just bought the 2 disc Ultimate edition DVD) but it really is a different animal (like the difference between MASH the movie and M*A*S*H the TV series)