24 Season 4 Episode 22 Synopsis

FOX:

While Agent Bauer, President Palmer and CTU operative brace for a devastating and imminent attack, terrorist mastermind Habib Marwan further complicates matters

The 24 Insider:

Marwan’s cell phone gives CTU a new lead that connects Richard Heller to Marwan. Richard is brought into CTU and he reveals a startling revelation that involves Mandy, the assassin from season 1 and 2. Tony and Michelle make a decision about their future but Mandy may ruin everything.