Episode 5: This Must Come as a Shock

Following the Viltrumites' attack, Mark spends two months helping Thraxa rebuild before returning to Earth with his brother. At the GDA, Donald confronts Cecil about his body. Cecil reveals he successfully recovered Donald's brain and placed it in a robotic endoskeleton. The Guardians discover a Martian ship bound for Earth, prompting Shapesmith to reveal his identity and the impending Sequid invasion. After Eve recommits to heroism with Rex's encouragement, she and Mark are recruited by Cecil to join most of the Guardians in thwarting the invasion, but they are overwhelmed. Concurrently, remaining Guardian members Rex Splode, Dupli-Kate, and Shrinking Rae confront the Lizard League after they capture a military base to ransom its nuclear missiles, resulting in Kate's apparent death, Rae getting devoured by Komodo Dragon, and Rex losing a hand and getting shot by King Lizard. Despite Thaedus ending his life support, Allen recovers from his injuries and has become as strong as a Viltrumite. Thaedus reveals he is a rebel Viltrumite and tasks Allen with recruiting Mark to aid the Coalition against the Viltrum Empire.