It really is Greg. I mean it. Greg. Sherlock calls me anything he wants to, but you call me Greg. Seriously.

See, bad things happen when even Sherlock calls me Gavin. Sherlock calls me Gavin and then John reminds him that it really is Greg and I remind him that it really is Greg and then the Terrible Two (I.e. Anderson and Donovan) get a hold of it and start calling Sherlock names for not remembering that it really is Greg and then they start calling me Gavin for kicks (ignoring, of course, that my name is Greg), and they won't let me live it down for a week, which, unfortunately, usually lands at around the time we ask for Sherlock's help again for a case. So please call me Greg. Honestly. And just don't even get me started on the 'penguins'.

-Greg (not Gavin) Lestrade