Charles Singh

A construction worker goes missing after he is mysteriously drawn into an underground tunnel full of human remains; Walter tries to simulate travel between realities on frogs.

The town blames Elsa when a fatal icy spell is cast on Marian, not knowing that another resident has the same powers; Mary Margaret struggles to balance motherhood and leading the town.

Erica, now officially in charge of the global Fifth Column, leads them in a high risk attack against Anna. Anna meanwhile, growing closer in her plan to destroy humanity, finds a major obstacle in a certain Live Aboard candidate. And Ryan sneaks back onto the Mothership to try and rescue his daughter. Recurring guest stars include JANE BADLER as Diana, MARK HILDRETH as Joshua, ONA GRAUER (Percy Jackson & the Olympians: The Lightning Thief) as Kerry Eltoff, Christopher Shyer as Marcus, Bret Harrison as Dr. Sidney Miller and MARTIN CUMMINS (Kyle XY, Shattered) as Thomas.

Seeking revenge against Anna, Erica heads to Hong Kong to carry out a mission to strike a lethal blow. Meanwhile, Anna learns that Tyler's phosphorous level is too low -- even after the Red Rain -- and he might become useless to her. Plus, Lisa and Diana (recurring guest star JANE BADLER) bond, as they begin to form an alliance against Anna.