About a game I once played...
 

I'm trying to find a game I used to play about ten years ago, a cartoon-y point and click mystery game. It's about this guy, something happens and his father (adoptive father) is missing. His father is some kind of scientist. The game is about the guy trying to find out what happened by exploring around and looking for clues. He suspects something sinister happened. They're not humans, they're just cartoon people in another world. I never got through much of the game back then and I'd love to find it again if anyone knows what it's called. Much appreciated.

Other than the father being a scientist and it being a mystery, it sounds like torins passage.

Alien Incident popped right in to my mind. Though it has a few differences.
But I can't think of any other game like that.

Woodruff and the Schnibble of Azimuth?
http://www.mobygames.com/game/win3x/...le/screenshots