MIB, Observers & Adjusters, etc.

The MIB, Observers & the Adjustment-Bureau, even the many forms of Doctor-Who, are characters capable of time travel and the editing reality.

http://blastr.com/2012/02/did-make-up-guru-rick-bak.php,

www.meninblack.com, www.bbc.co.uk/doctorwho/dw,

www.theadjustmentbureau.com/yourlifeadjusted