Sparks fly between Phoebe and Cherry's visiting brother, prompting Cherry to grow concerned that she will be overshadowed by this new romance; after Cherry begs Phoebe not to date her brother, Phoebe must decide between love and friendship.

Nana and Pop Pop Thunderman come to visit, but when Phoebe reveals Colosso is living in their house, Pop Pop's no-tolerance attitude toward supervillains leads him to banish Max and his bunny best friend to the Detention Zone.