buzzylittleb and
isiscolo both wrote
Serial Killer Callum RPF.
Since the fic got a bit lost in the comment thread,
isiscolo reposted
here at
ckr_actorfic and
buzzylittleb here in her journal.
I know how that sounds but trust me, it's fun!
(Also,
other people seem to think so too. Please note the caption!)
Now go and read.