Cast member of 24 Keifer Sutherland poses at a screening of the season finale of Fox television drama series 24 season seven in Los Angeles,California May 12, 2009. REUTERS/Fred Prouser

Three actors have landed multi-episode stints on Fox's 24, which returns for its eighth season on January 17.

Rami Malek (Night at the Museum) will play Marcos, a would-be suicide bomber with sympathies toward radical Islam. Julian Morris (ER) will play a CTU SWAT agent. Hrach Titizian will play Nabeel, the second-in-command of security for President Hassan (Anil Kapoor). Titizian also appeared on 24 in 2007.