King Vegeta is Vegeta's father and King of the Saiyans before his death at the hands of Frieza. He appears in Episode 25 in a flashback of Frieza. He blasts away Rutabega before getting some (rather bad) advice from Nappa. He then goes to talk to Frieza but is killed
"Wait, my son, the planet or me?"
"Chancelor Nappa, what do you think?"
"And you think that will work?"