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.

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

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.

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.

While “Severance” has a wonderfully creepy-compelling premise, it’s a concept better suited to a movie than a multi-episode TV series.