When does Gomer Pyle, USMC return?

Gomer Pyle, U.S.M.C. is an American sitcom that originally aired on CBS from September 25, 1964, to May 2, 1969. The show ran for a total of 150 half-hour episodes spanning over five seasons, in black-and-white for the first season, and then in color for the remaining four seasons. The series was a spin-off of The Andy Griffith Show, and the pilot episode was aired as the season finale of the parent series on May 18, 1964.
The premise of Gomer Pyle is similar to and perhaps inspired by Andy Griffith's starring role in the Broadway play and film version of No Time for Sergeants. The show was a fish-out-of-water piece, which, like its contemporary The Beverly Hillbillies, featured rural characters out of their normal settings. Author Elizabeth Hirschman noted that Gomer represented a "uniquely American archetype"