Astrodog meets.... well, quite a few folk. We've got Yoda, E.T, Wall-e, Vincent, Huey, Louie and Dewey (from the wonderful Silent Running). It's a bit of a Usual Suspects type line-up, but that's not an intentional reference.
Astrodog meeting these guys doesn't mean there won't be a more self contained pic later, I've got an idea for a Silent Running one, and I can't draw Vincent without wanting to draw Maximilian (who was, frankly, much cooler). Anyway, these will keep coming until I run out of ideas - or busy with other things.