Episode 1: You're Not Laughing Now

Three months after his battle with Angstrom, Mark continues training under Cecil's supervision to gain enough strength to compete with Viltrumites while avoiding Eve. Mark and Rex try to stop two thieves, Dropkick and Fightmaster, from stealing the Declaration of Independence, but are attacked by Kate's brother, Multi-Paul, who tries to avenge his sister's death. Kate and the Immortal come out of retirement while Rae returns to the Guardians. William and Rick encourage Mark to confess his feelings and ask Eve out, but warn him against telling her about her future self. However, Mark lets it slip, leading Eve to reject him. Doc Seismic breaks out of confinement and kidnaps Earth's superheroes using giant underground creatures. When Mark and Eve fail to save the heroes, Cecil sends in Darkwing II and Reanimen to help, with Darkwing II recapturing Doc Seismic. Mark confronts Cecil for lying to him and working with Darkwing II and Sinclair, leading Cecil to trap him in the White Room, which was constructed to keep him safe from Mark. Allen and Nolan bond in prison while the Viltrumites begin testing Allen to determine the source of his newfound strength.