Guest Stars Zazie Beetz voices Amber Bennett Andrew Rannells voices William Clockwell Chris Diamantopoulos voices Donald Ferguson Ross Marquand voices The Immortal Kevin Michael Richardson voices Mauler Twins Mark Hamill voices Art Rosenbaum Fred Tatasciore voices Kill Cannon Grey DeLisle Griffin voices Olga Sonequa Martin-Green voices Green Ghost Ross Marquand voices Aquarius Lauren Cohan voices War Woman Jon Hamm voices Steve Mahershala Ali voices Titan Mae Whitman voices Connie Fred Tatasciore voices Robber 1 Chad L. Coleman voices Martian Man Lennie James voices Darkwing Sean Patrick Thomas voices Guard #2 Michael Cudlitz voices Red Rush Uncredited Nickie Bryar voices Nikki