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 Lauren Cohan voices War Woman Sonequa Martin-Green voices Green Ghost Jon Hamm voices Steve Ross Marquand voices Aquarius Mahershala Ali voices Titan Mae Whitman voices Connie Michael Cudlitz voices Red Rush Fred Tatasciore voices Robber 1 Chad L. Coleman voices Martian Man Lennie James voices Darkwing Sean Patrick Thomas voices Guard #2 Uncredited Nickie Bryar voices Nikki