Episode 14 of "Will and Grace"
s01e14 Big Brother is Coming - Part 1
Title: Big Brother is Coming - Part 1
Original Air Date: 02/16/1999 on NBC
Plot Outline:
A "surprise" birthday party for Jack astounds Will when his estranged older brother Sam turns up at the fete at Grace's invitation. Not only do sparks fly between the brothers, but electricity of a different sort crackles between Grace and Sam. Meanwhile, Karen flashes her platinum card for Jack as the pair shop until they drop at a boutique where the snooty salesmen previously had snubbed Jack.