Stargate SG-1, Episode 6.15, Paradise Lost.   Maybourne shows up at O'Neill's cabin, helps himself to a weiner, and advises that he has knowledge concerning a huge cache of advanced weapony that renegade NID agents had earlier, but futilely, tried to obtain.  In exchange for being allowed to go on the related mission with SG-1, Maybourne promises to deliver a key to the supposedly impregnable door behind which the arsenal can be found.  But as is always the case with Maybourne, nothing is as it seems.

Click on a thumbnail for full-size picture.