was the head of the Galactic Peace Commission
Zanthus was murdered by Ahab and 4 Jixen. The murder was seen by K9, who tried to stop them. Before he could do so, K9 and the Jixen were brought to 2050 by Professor Gryffen's Space-Time Manipulator.
Ahab then travelled to the year 2050 to find K9. Due to his damaged memory, Ahab was able to frame K9 for the murder, convincing him to surrender himself.
However, when the lasso Ahab used on K9 to capture him caused some of his memory of Zanthus to be restored, he found out the truth and managed to defeat Ahab. (TV: The Bounty Hunter)