Review of The Adventures of Rin Tin Tin

I watched this show on TV watched I was a kid. Aside from the regular tV shows there was a "special" longer episode where the soldiers wore white hat instead of the usual blue, (I had a B&W TV so the hats were just dark). I remember the troops were defending the fort and Rusty got the idea to plant dynamite sticks outside the walls and the soldiers would shoot at them and explode near the attacking enemy. I couldn't find this episode on Y/T. If anyone knows where I can see this "special" showing, please let me know.