A story: After discovering that Link’s ex-girlfriend is a secret supervillian, Phoebe enlists Max’s help in exposing her rival’s true motives.
B story: Nora and Billy are afraid of a monster under Nora’s bed in their bedroom.

It was inevitable, with Phoebe getting a steady boyfriend in Link, that we’d get to the required “evil ex girlfriend” episode. Here, Link’s best friend, Quinn (surprise, she’s a girl, not a boy!) accompanies him on a visit to Hiddenville. Another surprise … Quinn sees Phoebe as competition for Link! Surprise … Max is attracted to the potentially evil Quinn! Surprise … Phoebe enlists Max’s help to take out the competition! Surprise … Quinn is actually an evil bug!
The B story involves Billy and Nora moving into their own bedroom but Chloe being afraid of monsters in her own bedroom. Billy and Nora end up sleeping in the living room (Hank and Barb dont find out for a few days, apparently); it turns out, once again, that Dr. Colosso was making noises underneath the bed.
This was not one of the better episodes of the Thundermans. Outside of the opening scene, there is no interaction between Max/Phoebe and Hank/Barb. It also seems like we’ve seen this plot before. It might have been more interesting if Max started dating Quinn, without Quinn raising the jealousy flag in Phoebe once again.
There are two common themes evident over the course of the show: Phoebe’s insecurity and Max’s overconfidence. Keep focusing on these themes but also focus on Phoebe become more confident and Max becoming more accepting of his “2nd place” behind Phoebe. They’ve got a talented cast here ….