Re: Alias: What the hell happened between seasons 3 and 4?
IIRC season 4 had a different showrunner than season three did. The new guy probably decided to go in a different direction (and I'm assuming with some new marching orders from ABC) since he would have his own ideas about the show he would want to use those rather than someone else's.
"See you in another life, brotha." - Desmond David Hume - Lost