I Knew She Was Alive

Lena Olin, aka Irina Derevko aka Sydney Bristow's mommy, has signed on to come back to Alias! She'll be back by the end of the season, and hopefully for the entire 5th season. Although it's slowly getting more exciting and more character and plot-driven, this season could still use a shot of adrenaline. Lena Olin is that shot.