The action in this episode alternates between "business as usual" at the 4077th and a tacky USO Show headed by second-rate comic Jackie Flash (Joey Forman). Thing of it is, nothing that Jackie says or does is nearly as funny as the average goings-on within the M*A*S*H unit. One of the many plot strands involves one Captain Kaplan (Harvey J. Goldenberg), whose tour of duty is over, but who is convinced that disaster will befall him if he attempts to leave for home. "
Showtime" was originally telecast on March 25, 1973, as the final episode of M*A*S*H's first season. ~ Hal Erickson, All Movie Guide