(Click for 1080p!)

Boy, this has been a long time coming. Every year I said I'd do it, and one year I actually made an attempt, but then stuff happened and I got discouraged and went back to forgetting about it till the last minute. How long ago did I start planning this? Long enough that Gamma and Denny are in it but Alice isn't, for starters. Alice will probably start showing up next year... in the very unlikely chance I remember to do another one.

How many of them can you name? Some are easy, others not so much. Post your guesses below! I'll pop back in about a week from now with an alternate labeled version.

Extra super bonus points if anyone recognizes the location, because that's also an obscure reference (probably the most obscure of all, even before taking into account how little there is to go on).