Karl Urban as Julius Caesar and Cupid on Xena brought a level of acting talent, and a true on-screen presence that was matched by few other guest stars.
Caesar's effect on Xena throughout her life was undeniable, and as Caesar few others brought the drama, danger and sexiness to the show that he did consistently.
From early on it became clear that Karl was a cut above. His outstanding moments in "Destiny", "The Ides of March" and "When Fates Collide" (just to name a few) were spine-tingling. He owned the character and his chemistry with Lucy Lawless was undeniable.
As Cupid, he brought a real sense of 'coolness' to the show, and a genuine sense of fun - Cupid was all about being sexy and having a good time.
There is no doubt that Xena would not have been the same show without Karl - he helped to make it unforgettable and an all-time classic.