The most arresting image in the new BBC Studios series Trigonometry (airing in the US this summer on HBO Max and in Canada on CBC Gem) comes in the fifth episode, when restaurateur Gemma (Thalissa Teixeira), in the middle of a difficult Nordic honeymoon getaway with her new husband Kieran (Gary Carr), goes on an evening field trip to see the Northern Lights. As Kieran sulks back at the hotel, she gazes up at a display that imbues the uncanny sensation—for the character, as well as the audience—of a planetarium-show special effect despite its you-are-there authenticity.