Glad you had fun!
Charlie actually was an accidental reference, but we did know of that. I remember when we were coming up with the characters and like 5 minutes after coming up with the name for Charlie my friend was like: "Wait a second..." and showed us that channel. We just decided to keep that, because that is pretty funny.
I'm also pretty happy that the who could have not done it thing worked, because we didn't playtest at all and realizing who the culprit is could have been way too hard.