2x4 - American Dad!

When Stan's father passes away, Stan reveals his real father is actually Jack Smith, a super suave spy. Jack convinces Stan to quit the CIA and work with him at the Scarlet Alliance, an ultra-secret spy group. Francine is upset with Stan, who is busy training with Jack for a mission involving uranium, artwork and terrorists. But when the FBI shows up at the Smiths' house looking for an international jewel thief, Francine suspects Jack is the fake.