Product Placement Blog ➞ RogaineRogaine in Seinfeld Season 9 Episode 18 “The Frogger” (1998)December 14, 2019 Sergey TV Show Hi! On Saturday, December 14, I watched a TV Show and product placement was spotted: Rogaine in Seinfeld Season 9 Episode 18 “The Frogger” (1998).