Photo Flash: John Stamos' Return to GLEE

Dr. Carl (John Stamos) and Holly Holiday (Gwyneth Paltrow) return to "Glee" for an all new "Sexy" episode Tuesday March 8 on FOX. Take a sneak peek at the upcoming episode below!

When free-spirited substitute teacher Holly Holliday fills in for the absent sex-education teacher, she joins forces with Mr. Schuester (Matthew Morrison) to teach the kids of New Directions the facts of life. Meanwhile, Emma (Jayma Mays) heads up the Celibacy Club, and she and her new hubby Dr. Carl address some issues in their personal life in the all-new "Sexy" episode of GLEE airing Tuesday, March 8 at 7:00 p.m. on FOX TV in Denver.

GLEE made its triumphant return to prime time with an astounding 12.3 million viewers tuning in to the Season 2 premiere. The anticipation and excitement for GLEE music reached new heights with over 250,000 new tracks downloaded in the first 48 hours available. This incredible response yielded more record breaking moments for GLEE; it's the first time all singles from any episode simultaneously appeared in the top 10 of iTunes Top Songs chart. Additionally, the GLEE Cast version of Jay-Z's anthem "Empire State of Mind" has the single highest first day sales for any GLEE track released to date.