After Jeannie blinks Tony back to the office from the plane in the beginning he is no longer wearing his parachute instead he is back in his air force jacket.
At the very end when Major Healey opens the kitchen door and pulls off the fake mustache, the kitchen door is white. The kitchen door was always brown from seasons 3-5 until the Nelson's had their house redecorated in the following episode, The Mad Home Wrecker (1969).
Inside the barn, after Maj. Nelson tried to escape, the shadows of a camera and crew member are visible on the right side of the shot.