There's been a few over the years, but I just redisocvered this one on YouTube... (knowing my memory, I posted about this already at some point, but - the search here sucks, so - I'll subject you all again)

This was part of "The Late Show", which [s]d[/s]evolved from "The D Generation", etc etc. Circa 1992-3.

"The Doctor" is played by Rob Sitch, whilst the Brigadier is played by Tony Martin (a Kiwi). The... other... Doctor is played by early Aussie Cooking Celeb, Peter Russell Clarke...