The Then and the Now
From Tardis Wiki, the free Doctor Who reference
The Then and the Now was a legend used to scare Gallifreyan children. The legend said that it was a person who got its hands on a time machine and destroyed its own timeline and became an impossible walking paradox.
The Overcast hired the Then and the Now as bounty hunter to capture the Eleventh Doctor. (COMIC: The Then and the Now)
