Monarch: Legacy of Monsters Season 1 on Apple TV+ explores the origins of the organization through two parallel narratives: a 1950s team tracking radioactive creatures and a 2015 search for a missing family member following the San Francisco G-Day. The season culminates in a 2017 finale featuring a return from the Hollow Earth, Lee Shaw’s sacrifice, and a surprising arrival on Skull Island, setting up a second season. For a complete breakdown, watch the recap on YouTube . Monarch: Legacy of Monsters - Season 1 Timeline & Recap