After that project, he moved back to Warner Bros. Animation, where he directed two DC Showcase short films: The Spectre (accompanying the Justice League: Crisis on Two Earths direct-to-video movie) and Jonah Hex (on Batman: Under the Red Hood).
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He went on to direct half of the episodes of JLU alongside fellow DCAU director Dan Riba, including the final episode "Destroyer".
DOS | MS-DOS | Santos | John Dos Passos | Vilma Santos | Juan Manuel Santos | Santos FC | Santos, São Paulo | São José dos Campos | Campos dos Goytacazes | Alberto Santos-Dumont | Judy Ann Santos | Daniel Santos | Sergio Santos | Plaza Dos de Mayo | Junior dos Santos | Graciano dos Santos Neves | Enrique Santos Discépolo | Dos Pueblos High School | Dos Hermanas | Daniel Santos (singer) | Boaventura de Sousa Santos | Arwind Santos | Angra dos Reis | Universidade do Vale do Rio dos Sinos | Un, dos, tres... responda otra vez | Todos Santos | Santos Dumont Airport | Santos Cardona | Matt Santos |
DC Showcase: The Spectre is a 2010 short animated film, directed by Joaquim Dos Santos and written by Steve Niles, featuring Gary Cole as Detective Jim Corrigan, whose suspects are brought to justice by his alter-ego the Spectre.