Tom Hanks plays Richard, a talented musician who becomes the unwitting focus of CIA surveillance due to a series of mistaken identities.
Dabney Coleman portrays Cooper, a CIA operative who becomes convinced that Richard is a highly skilled spy.
Lori Singer plays Maddy, Richard's love interest who gets caught up in the chaos surrounding him.
Charles Durning portrays Ross, the head of the CIA operation targeting Richard.
Carrie Fisher plays Paula, a fellow CIA operative working alongside Cooper and Ross.
Edward Herrmann portrays Brown, a high-ranking CIA official caught up in the surveillance operation.
Jim Belushi plays Morris, a friend of Richard who inadvertently complicates the situation further.
Irving Metzman portrays Virdon, a member of the surveillance team monitoring Richard.
Tom Noonan plays Reese, a CIA operative involved in the surveillance operation targeting Richard.
Gerrit Graham portrays Carson, a bumbling CIA agent who adds to the comedic chaos.
David L. Lander plays Stemple, a member of the surveillance team assisting in monitoring Richard.
Ritch Brinkley portrays Hulse, another member of the surveillance team caught up in the comedic confusion.
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