D. Garnet Harding

After a violent tremor shakes a Manhattan office building, the sole survivor leads the team to believe he is not from this reality; Olivia must face her mysterious past to save hundreds of people from certain death.

Anna, enraged at the increasing audacity of the Fifth Column attacks, enlists Ryan in an attempt to wipe out the Fifth Column in one fell swoop. Meanwhile, Father Travis (recurring guest star SCOTT HYLANDS -- Night Heat), following Vatican orders, asks Jack to leave the church. Plus, Lisa meets her grandmother, Diana (recurring guest star JANE BADLER) -- who Anna said was dead -- for the first time. Recurring guest stars also include ODED FEHR, JAY KARNES, ROARK CRITCHLOW, NICHOLAS LEA and CHRISTOPHER SHYER.