Spoilers ahead for the first season of “Russian Doll.”

In the new Netflix series “Russian Doll,” Nadia (Natasha Lyonne), a cynical video game programmer with commitment issues, finds herself caught in a never-ending cycle of death and resurrection on the night of her 36th birthday party. No matter what Nadia does, she eventually dies and awakens in the same bathroom on that same night at that same party. And with almost every reset, the staccato piano chords of a nearly 50-year-old pop tune kick in.

[Read our critic’s review of “Russian Doll.”]

That song is “Gotta Get Up,” the opening track from the late singer-songwriter Harry Nilsson’s 1971 album “Nilsson Schmilsson,” and its bright, infectious instrumentation belies melancholy, wistful lyrics about growing older.

“We used to carry on and drink and do the rock ’n’ roll,” he sings. “We never thought we’d get older/We never thought it’d grow cold.”