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It's the series finale of No Ordinary Family. The Powells team up to save JJ on this concluding episode.

Stephanie must do all she can to alter the present this week, considering the future she has witnessed. Mrs. X also takes action.

The Powells find themselves in major danger this week. Also, Sara Bareilles guest stars as herself.

As Sophie, Tricia Helfer tries to make Jim and George fall under her spell this week. Elsewhere, will Stephanie inject a patient with the trilsettum serum?

Jim has a reason to feel very guilty this week. His powers lead to a boy getting shot and almost dying.

Victoria receives an order from Dr. King this week: slip into the Powell's home. And kill a family member.

Stephanie wants to become a crime fighter this week because a friend is attacked. Elsewhere, Katie learns disturbing news about Joshua.

Joanne Kelly guest stars this week as an Internal Affairs officer reporting on a rogue cop. When the police station gets taken over, though, Jim must come to the rescue.

Jim's brother pays a visit to the Powells this week and discovers their powers. Rebecca Mader also guest stars as someone who gives Katie a promotion.

Jim and Stephanie make new friends on this week's episode, but then begin to have suspicions. The pals are played by Ricky Schroder and Annie Wersching.