Questions About An Ep?

There is one particular episode of "Gomer Pyle: USMC"
that stands out after many years. Can anybody please
identify the episode title and season?

In the storyline Gomer's unit is participating in
a war games exercise. Gomer Pyle is "captured"
by the opposing Marine squad. And brought to see
a doctor for a check up. The naval doc leaves
momentarily and Gomer sees the doc's service
dress whites uniform hanging in the office. He
puts on the whites and fools the guard outside
into thinking that the "prisoner" has escaped.
Gomer then steals a nearby parked jeep with
an M50 caliber machine gun mounted on the hood.
He then drives back to the area where he had
been taken prisoner. And upon seeing Gomer Pyle,
one NCO of the "enemy unit" asks the other,
what's a navy commander doing here? That's
because of Gomer being dressed in the doctor's
uniform with the rank insignia of a navy commander.
And upon seeing the two NCOS, Gomer takes hold
of the machine gun and points the weapon at the
two men. Ordering them to drop their weapons and
surrender. He even shouts "that's an order sergeant."
A very hilarious moment in a very funny episode.
One that I watched many years ago.

Lorenzo Sunny Florida

I'm James "Sonny" Crockett!