Which episode is it where Ralph runs out of Arnold's wearing just his undies? I saw a clip of it in the promo for HD and AT&T 3, which episode it that? I'm just curious?

It's the episode where Mork from Ork makes his first appearance. Fonzie and Mork are dueling at Arnolds', and Mork does his magical powers on Ralph, causing his pants to disappear

Sounds hilarious!!!!! Sounds hysterical!!!
This episode , My Fvaorite Orkan, is the oen I wanted to tape that was going to be on Hallmark, and i still realyl wnat to see it, so if you know where Happy Days airs now, and if that episode is on, i would love to see it, I may get AT&T 3 Broadband, so I can have Happy Days, and watch it, and see that episode