"Crystal Lake" adds a new killer to the Friday the 13th canon. Warning: This article discusses self-harm. Five episodes into Peacock's Crystal Lake, Friday the 13th fans come across a familiar sight. With all of Camp Crystal Lake's campers asleep in their beds, their counselors gather by a fireplace for some late-night singing. Couple Claudette (Danielle Kotch) and Barry (Phoenix Parnevik) make eyes …