Young Hercules (1998)

S1E24 Dad Always Liked Me Best

Hercules encounters Lucius, another mortal offspring of Zeus, who reveals that he’s pursuing Pollux under Zeus's orders to bring him to justice for the death of their brother, Castor. Eager to help, Hercules teams up with Lucius, oblivious to the fact that Lucius himself was responsible for Castor's demise and has ulterior motives that exclude his brothers from his ambitions.