T:TSCC
It's a shame they had to recast Dr Silberman for The Sarah Connor Chronicles. Not because Bruce Davison isn't a good actor (generally rather fond of his work, in fact), but with Earl Boen being the only actor besides Arnie to appear in all three films (and the 3D attraction, I gather), not to mention the only actor at all to play the same character in each of them, it would have been nice to keep it going here.
(I understand there are reasons, like Boen's retirement, but it would have been nice nonetheless.)