Ensign O'Toole is a military comedy that aired on NBC from September 23, 1962, to May 5, 1963, with 31-year-old Dean Jones in the title role of a nonchalant United States Navy ensign during the early 1960s. Jones, born in 1931 in Alabama and a Navy veteran of the Korean War, played an officer aboard the fictional U.S. Navy destroyer USS Appleby, which roamed the Pacific Ocean.

Dean Jonesas Ensign O'Toole
Jack Mullaneyas Lieutenant Rex St. John
Harvey Lembeckas Seaman Gabby Di Julio
Jay C. Flippenas Chief Petty Officer Homer Nelson
Jack Albertsonas Lieutenant Commander Virgil Stoner
Harry Morganas Charlie
Skip Wardas Lt. Ferguson
Stuart Margolinas Lt. Miller
Stafford Reppas Commodore
Charles Tannen
James Komack