Prepare for a significant return tonight, White Collar fans.

Gloria Votsis, who was last seen at the end of Season 2 as one of several folks tracking the treasure-filled submarine, pops up again as Alex. What is she doing in town? Where has she been? Watch this opening sneak peek for a couple answers:

As for how our favorites will react to the presence of Alex in the city, Mozzie might be on the verge of a slight freak out:

Elsewhere, Peter and Neal will discuss the best way to get to Alex, with the latter figuring he can "finagle" things his way and the former warning him: Careful with how you finagle!

Finally, check out this clip of Neal interacting with Alex and Mozzie going through her underwear. No, really. Watch now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.