Elementary 7x4 Red Light, Green Light Season 7 Season 1 24 EpisodesSeason 2 24 EpisodesSeason 3 24 EpisodesSeason 4 24 EpisodesSeason 5 24 EpisodesSeason 6 21 EpisodesSeason 7 13 Episodes 7x1 - The Further Adventures 7x2 - Gutshot 7x3 - The Price of Admission 7x4 - Red Light, Green Light 7x5 - Into the Woods 7x6 - Command: Delete 7x7 - From Russia with Drugs 7x8 - Miss Understood 7x9 - On the Scent 7x10 - The Latest Model 7x11 - Unfriended 7x12 - Reichenbach Falls 7x13 - Their Last Bow After an explosion at a traffic stop, Holmes and Watson must determine whether the attack was a terrorist attack; Holmes and Watson suspect there is more for them to discover regarding the recent attack on someone within their inner circle.