Saddle Rash (2002)

S1E22 Diamonds Are an Ape's Best Friend

Title: The Ape's Affection Plot: A gorilla becomes infatuated with Mrs. Howell's fragrance and takes her captive. Meanwhile, Gilligan accidentally drenches his shirt in the same scent, prompting the gorilla to change his mind and return Mrs. Howell in a swap for Gilligan.