Pac-Man
From Tardis Wiki, the free Doctor Who reference
"Pac-Man" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
A circular yellow character with black dots for eyes and a triangular mouth was depicted in front of 2 orange circles in graffiti on a wall in Cardiff in the 2000s. (TV: Everything Changes)
Behind the scenes
Although not stated in TV: Everything Changes), the character depicted on the wall was Pac-Man, moving towards 2 Pac-Dots (also called, among other things, Pellets).