Product Placement Blog ➞ Caps & SnapbacksCarhartt Cap of Mark Harmon as Leroy Jethro Gibbs in NCIS S18E01 “Sturgeon Season” (2020)November 18, 2020 Sergey TV Show Hi! On Wednesday, November 18, I analyzed a TV Show and product placement was spotted: Carhartt Cap of Mark Harmon as Leroy Jethro Gibbs in NCIS S18E01 “Sturgeon Season” (2020).Here are 1 image(s) below: