Lost in Space 1x3 Infestation Season 1 Season 1 10 EpisodesSeason 2 10 EpisodesSeason 3 8 Episodes 1x1 - Impact 1x2 - Diamonds in the Sky 1x3 - Infestation 1x4 - The Robinsons Were Here 1x5 - Transmission 1x6 - Eulogy 1x7 - Pressurized 1x8 - Trajectory 1x9 - Resurrection 1x10 - Danger, Will Robinson Flashbacks reveal clues to Dr. Smith's past. The Robinsons contend with a new threat as the ship's fuel supply starts dropping -- fast.