First half is from "Mind Control," S01E02. Second half is from "Trick of the Mind," S03E04.
You can be fooled no matter how smart you think you are. Don't think you can be fooled? Just watch this video:
http://www.youtube.com/watch?v=voAntzB7EwE
The face at 3:03 is just an editing error. I did not intend for a subliminal message.