Tramell Tillman and Patricia Arquette, stars of Apple TV+ sci-fi mystery co-starring Adam Scott, which returns January 17.

Fortunately, “Severance” returns to Apple TV+ on Friday, and its makers seem to have used every second of the absence productively. The season takes new turns while remaining the most ambitious, batty and all-out pleasurable show on TV, an M.C. Escher maze whose plot convolutions never get in the way of its voice, heart and sense of humor.

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.