Abdul al-Hassan

Abdul al-Hassan was a Sheik attending the Unity Conference.

Trinity
Al-Hassan, conversed with Father Sam Collins and Rabbi Dan Bender at a restaurant where a collection of clerics of different faiths, led by Cardinal Mulrooney, were located. Later, al-Hassan was in his apartment when his doorbell rang. He answered it and saw his brother on the other side of the door, arm in a sling. He killed his brother and posed as him when Nina Myers came to speak to Abdul about his connection to Ali Abdul.

Mercy Bennet discovered that Abdul was dead and contacted Jack Bauer, who realised that it was not him at the Unity Conference. It was with this information that he managed to stop Abdul's brother from killing the Pope.