Elementary 1x18 Deja Vu All Over Again Season 1 Season 1 24 EpisodesSeason 2 24 EpisodesSeason 3 24 EpisodesSeason 4 24 EpisodesSeason 5 24 EpisodesSeason 6 21 EpisodesSeason 7 13 Episodes 1x1 - Pilot 1x2 - While You Were Sleeping 1x3 - Child Predator 1x4 - The Rat Race 1x5 - Lesser Evils 1x6 - Flight Risk 1x7 - One Way to Get Off 1x8 - The Long Fuse 1x9 - You Do It To Yourself 1x10 - The Leviathan 1x11 - Dirty Laundry 1x12 - M. 1x13 - The Red Team 1x14 - The Deductionist 1x15 - A Giant Gun, Filled with Drugs 1x16 - Details 1x17 - Possibility Two 1x18 - Deja Vu All Over Again 1x19 - Snow Angels 1x20 - Dead Man's Switch 1x21 - A Landmark Story 1x22 - Risk Management 1x23 - The Woman (1) 1x24 - Heroine (2) Joan investigates her first solo case when a wife disappears. The missing woman left behind a tear-filled video that mentions a murder on a subway platform. While Joan searches for the vanished lady, Sherlock probes the murder.