Percy Jackson & the Olympians season 1, episode 7 sees Percy and his friends finally reaching the Underworld, but he and Grover nearly get pulled into Tartarus, a pit with origins in Greek mythology.

Percy Jackson episode 7 saw the trio of Percy, Annabeth, and Grover traveling across the Underworld. With only one episode of Percy Jackson season 1 remaining after episode 7, the quest for Zeus ...