Sorry, as I do know that.
The episode was the Mischevous Elf with Glenn Quin. The scene is that Jesse goes with Sean (Quin) on a date and he says they have to go someplace. Turns out it is a DND game. The scene I want, and hence my title, is that the players are all standing around when the DM walks in with a hat and robe, and they all kneel and say, "Hail, Dungeon Master!"
The rest of the episode is about her trying to get out of the game.
Thanks!
Have a good one! Take care!
edg