Three Girls on an Island

A plane with the singing Tyler Sisters aboard is forced down with engine trouble on a deserted island. McHale and the 73 crew are sent to pick them up, with more than their rescue on their minds, but wind up being quite disappointed.

Plot
A 3-sister singing act is stranded on a deserted island, and McHale and the 73 crew have an ulterior motive when they volunteer for the rescue mission. But the girls, having had such experiences in the past, are wise to their plan.

McHale's Island

 * Ernest Borgnine: Quinton McHale
 * Tim Conway: Charles Parker
 * Carl Ballantine: Lester Gruber
 * Gary Vinson: George "Christy" Christopher
 * Billy Sands: Harrison "Tinker" Bell
 * Edson Stroll: Virgil Edwards
 * Gavin MacLeod: Joseph "Happy" Haines
 * John Wright: Willy Moss
 * Yoshio Yoda: Fuji Kobiaji

Main Base

 * Joe Flynn: Wallace Binghamton
 * Bob Hastings: Elroy Carpenter

Other

 * Jackie Russell: Lil Tyler
 * Asa Maynor: Rita Tyler
 * Marian Collier: Peggy Tyler
 * Herbert Lytton: Admiral Reynolds
 * Vince Williams: Lieutenant Harkness
 * Jeff Malloy: Pilot 1
 * Gene Tyburn: Pilot 2

Mentioned

 * Tulara
 * General Laurence