Product Placement Blog ➞ BicyclesKlein Bicycle in Seinfeld Season 6 Episode 20 “The Doodle” (1995)December 9, 2019 Sergey TV Show Hi! On Monday, December 9, I watched a TV Show and product placement was spotted: Klein Bicycle in Seinfeld Season 6 Episode 20 “The Doodle” (1995).