Elementary 4x11 Down Where the Dead Delight Season 4 Season 1 24 EpisodesSeason 2 24 EpisodesSeason 3 24 EpisodesSeason 4 24 EpisodesSeason 5 24 EpisodesSeason 6 21 EpisodesSeason 7 13 Episodes 4x1 - The Past Is Parent 4x2 - Evidence of Things Not Seen 4x3 - Tag, You're Me 4x4 - All My Exes Live in Essex 4x5 - The Games Underfoot 4x6 - The Cost of Doing Business 4x7 - Miss Taken 4x8 - A Burden of Blood 4x9 - Murder Ex Machina 4x10 - Alma Matters 4x11 - Down Where the Dead Delight 4x12 - A View With a Room 4x13 - A Study in Charlotte 4x14 - Who Is That Masked Man? 4x15 - Up to Heaven and Down to Hell 4x16 - Hounded 4x17 - You've Got Me, Who's Got You? 4x18 - Ready or Not 4x19 - All In 4x20 - Art Imitates Art 4x21 - Ain't Nothing Like the Real Thing 4x22 - Turn It Upside Down 4x23 - The Invisible Hand 4x24 - A Difference in Kind Holmes and Watson must search for a killer without any physical evidence to aid them after a bomb is detonated in the New York City morgue. Also, Watson is suspicious when an NYPD detective she’s in a grudge match with asks her to consult on a case.