darkknight
Super Freak
Michael Irbys from The Unit was one of the mercenaries that tried to kidnap Hassan, and eventually (after Jack killed everyone but Irby) took Hassan voluntarily and delivered him ...
... but I don't think the team on 24 was supposed to be an official military unit. I think it was a group of mercenaries and private contractors. Not exactly the Delta Team from The Unit ... but Irby's presence certainly reminded me of The Unit.
SnakeDoc
I think the producer wanted to make an image like it was The Unit by showing Irby face before putting on the balaclava and also when he was reporting in after the capture of Hassan. He stated something like "The entire Unit is dead except me" BTW, was there 5 mercenaries or more?