<Ul> <Li> Titan appears in the Guardians of the Galaxy episode "Titan Up ." This is where Thanos trains his followers at and is where Sam Alexander's father Jesse is being held prisoner . </Li> </Ul> <Li> Titan appears in the Guardians of the Galaxy episode "Titan Up ." This is where Thanos trains his followers at and is where Sam Alexander's father Jesse is being held prisoner . </Li>

Who are the titans in the marvel universe