24 Season 4 Episode 21 Synopsis

TV Guide:

Palmer tries to deflect responsibility for the raid as the Chinese try to ID those involved. Audrey is asked to provide cover for Jack. Marwan moves his schedule up in response to CTU’s technical defenses. Tzi Ma as Cheng.

The 24 Insider:

Marwan speaks with his operatives in Iowa and he instructs them to speed up the launch process. Marwan knows that CTU’s satellites will eventually track their location and he sends them the new coordinates for the missile and the operatives start to make the proper changes and the missile will be ready to launch within the hour.