Young Hercules (1998)

Season 1: Episode 24

Hercules meets Lucius, another mortal son of Zeus, who tells him that he is on the trail of Pollux on the request from Zeus himself to deliver Pollux to death for the crime of the death of Castor, their brother. Hercules agrees to join him, unaware that Castor was actually killed by Lucius, who has some ambitious plans that don't include his brothers.