The Lucy Show

 
Series aired: 1962 - 1968
Video from Internet Archive
 
Primetime TV  
 

Lucy and the Submarine

Season 5, Episode 2
September 19, 1966
 
Mr. Mooney is called in for his National Reserves training aboard a submarine. Unfortunately, he forgot to sign some important documents before leaving. Lucy gets an idea that if she dressed as a sailor, she could sneak aboard the sub undetected.  
The Lucy Show
Available on DVD