Product Placement Blog ➞ 3M3M Littmann Stethoscope in The Blacklist S10E15 “The Hat Trick” (2023)June 5, 2023 Sergey TV Show Hi! On Monday, June 5, I watched a TV Show and product placement was spotted: 3M Littmann Stethoscope in The Blacklist S10E15 “The Hat Trick” (2023).