Here’s a quick refresher on where things stand with Mark, Helly, and the gang The second season of Severance, which debuts tonight on Apple TV+, proves that the corporate sci-fi drama has still got it.

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.

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.