Real Men (1988)

Nick Pirandello (James Belushi) is considered to be the best of the best among his colleagues at the CIA. So, when the agency loses its inside man on a top-secret mission, Nick is recruited to work with an everyday citizen, meek suburban dad Bob Wilson (John Ritter), who is the spitting image of the agent initially assigned to the case. Not only is Bob unaccustomed to the nature of dangerous CIA work, he also finds Nick's claims that the mission involves aliens a bit suspect.