@negativenull@lemm.ee was kind enough to post the video in it's own post. I do not remember it at all yet loving IT Crowd. I must have somehow completely missed that episode. Even the whole 'exwife back from the dead and suing him' thing is utterly foreign to me.

The sex pants, yeah. That I vividly remember. He's looking through a magazine about cars and his crotch keeps buzzing before he gets frustrated and says "GodDAMN these electric sex pants!" which... I kind of want tattooed somewhere.

Yep! I had the same "Wait a fucking minute" moment there, I just couldn't place her face exactly and had to check the cast listing. That is indeed Gemma Chan!