“Through the Valley of Shadows” is the 12th episode of the 2nd season of the TV show “Star Trek: Discovery” and follows “Perpetual Infinity”.

A new cosmic signal is detected and even if its origin is unknown it’s a trace that can’t be ignored. It brings to Boreth, the Klingon planet that hosts a monastery that among other things keeps time crystals. While Captain Christopher Pike (Anson Mount) goes to the monastery, Michael Burnham (Sonequa Martin-Green) and Spock (Ethan Peck) investigate an anomaly linked to the activity of a Section 31 starship.