After a violent attack on someone very close to Anna, she delivers a message that the Vs don't feel safe and will be leaving while she also gives a list of possible Fifth Column members to Chad hoping he'll investigate to help in finding them. Meanwh... (more)ile, Erica and the team try to track down a scientist who may have created a weapon that the Visitors are afraid of.

Charles Mesure, Christopher Shyer, Lexa Doig, Lucas Wolf, Mark Hildreth, Rekha Sharma, Roark Critchlow