Here is the Scooby cast. For some reason, in this photo, I am temporarily undead.
Here is the Buffy cast (and Marc Ovies as Shaggy in the background).
Every year, the costume contest really sparks the creativity of the community. Among others pictured here are Curious George and the Man with the Yellow Hat, the Big Boy, a knight in hand-made chainmail, and, of course, Optimus Prime.
But the prize for "most photogenic" goes to Pat and Mary for this picture.