The two-part season finale of “Alias” (“Search and Rescue”) will see the return of several familiar faces from the series, including Irina Derevko (Lena Olin), who has been absent since the end of the second season, and Bradley Cooper (Will Tippin), who made a guest appearance in Season 3.
I found this info in an article about Melissa George on Alias-media.com because people were wondering if she was going to make an appearance in the season finale as well... and I'm wondering if it's true about Bradley because that would be awesome! Anyway, if you have intel on this situation please post it here!