Cipher

Summary

Sydney must outwit Sark in order to find a crucial piece of intel. Meanwhile, Jack faces Sydney's mother for the first time in almost 20 years. Will finally meets Vaughn and Sloane is haunted by his wife's death.

Guest stars

• Merrin Dungey as Francie Calfo
• Terry O'Quinn as Kendall
• Patricia Wettig as Judy Barnett
• Tom Kiesche as Agent Cooper
• Alex Morris as Homeless Vet
• Janet MacLachlan as Jane Banks
• Mark Colson as OPS Director
• Endre Hules as Mr. Vashko
• Keith Lewis as Agent Novak
• Ilya Melnikoff as A.S.A. Technician #1