At one point just before the hybrids go on their mission to find Wendy's brother, she's sitting in the lab taking part in an audio test that involves raising her hand when she hears a beep. The key line, which is muttered by a technician shortly before Wendy spots her brother on a nearby screen? "She's beyond our human frequencies. 75,000 hz."

Wendy goes on a mission, Kavalier reveals a master plan and Kirsh plants a seed in an episode that feels like its killing time as much as Xenomorphs.