Taking the idea of work-life balance to extremes, the sardonic and surrealist thriller “Severance” on Apple TV+ envisions a dystopian corporate world in which employees of a company called Lumon Industries have a chip implanted in their brains that severs their memory in two.

Nearly three years after one of the most aggressive cliffhangers in recent memory, the mysterious Apple series is about to flip the switch again and finally answer the fates of the core characters.

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.