American Dad! - Season 1 Episode 11 -

A man claiming to be Stan's real father shows up at his father's funeral. Stan explains that the man to whom everyone knew to be his father was in reality a stranger he met at a bus stop on his wedding day. So now Stan's real father, a secret agent, wants Stan to accompany him on a top secret mission. Unbeknownst to Stan, his father has a hidden agenda.