Aegis
From Tardis Wiki, the free Doctor Who reference
The Aegis were a race who had been known to use metamorphic cats in their undercover missions. (MA: Invasion of the Cat-People)
Behind the scenes
The Aegis originate in the Star Trek universe. They were a mysterious group of highly-advanced aliens who lived on a hidden planet and attempted to safeguard the timeline and the fates of many races and cultures throughout the galaxy.
