Adam Scott heads up the cast of ‘Severance’ season 2 as Mark Scout, the Lumon employee who has the severance procedure following the loss of his wife. He’s seen here at the premiere of “Hot Tub Time Machine 2” on February 18, 2015 in Westwood, California. He previously starred in ‘Krampus,’ ‘The Overnight,’ and ‘Parks & Recreation,’ among others.

The acclaimed Apple TV+ series is making its long-awaited return. A second season was filmed over three years.

Here's what you should remember from the first season of "Severance" and how certain moments and symbols could foreshadow what happens in Season 2.