Old friends Natasha Lyonne and Melanie Lynskey have lots to reminisce about, having first forged a bond during the filming of the 1999 Kiss-inspired movie “Detroit Rock City.” But their most memorable on-screen pairing was in another movie that premiered that year — director Jamie Babbit’s queer cult classic “But I’m a Cheerleader.”

A quarter century into their friendship, Lynskey and Lyonne appreciate that both of their careers are peaking now that they’re in their 40s. On Showtime’s “Yellowjackets,” Lynskey plays Shauna, a reckless New Jersey housewife traumatized by her experiences in the wilderness as a teenager. In the Peacock howdunit “Poker Face,...