Season 1 Episode
- Season 1 Pilot
- Season 1 Lights Out
- Season 1 Watershed
- Season 1 Alpha Male
- Season 1 Unnatural Selection
- Season 1 The Hunt
- Season 1 Fish Story
- Season 1 The Cradle
- Season 1 The Dredge
- Season 1 Origin of Species
- Season 1 Us or Them
- Season 1 Power
- Season 1 Redemption
- Season 1 All God's Creatures
- Season 1 The Nest
- Season 1 The Fittest
- Season 1 The Key
- Season 1 Re-Evolution
- Season 1 The Son Also Rises
- Season 1 Run and Gun
- Season 1 Round Up
- Season 1 The Last Wave Goodbye
Invasion - Season 1 Episode 17 The Key
7.10 42 minutes Mariel begrudgingly performs an ultrasound when Christina demands to know what is growing so quickly inside of her. After the school reopens, Jesse is bothered by the way; some of the fellow students are acting. Russell and Dave investigate what Healy knew about the hybrids.
