They Lurk Below (S02E10)

Title: They Lurk Below Plot: Our protagonists board a jet belonging to Donovan Grand Smith, an old friend of Grandpa Max, who runs an underwater resort. Upon arrival, they are greeted warmly by Donovan, though his grandson Edwin appears less than thrilled with their presence. As Ben, Gwen, and Edwin explore the Undersea Manta Ray, a massive submarine, they confront a group of mysterious aliens intent on wreaking havoc at the resort. While the kids work together to uncover the source of the aliens’ attraction, Donovan discovers valuable insights into strengthening his relationship with Edwin.