Love can drive you nuts. One recent illustration of how can be seen in the American TV show "Crazy Ex-Girlfriend," about a successful New York lawyer who runs into her teen crush one day, and soon after quits her job and moves to California to be near him. That is, she becomes his stalker, but would rather die than admit it.

Then there's "You, Your, Yours," Daigo Matsui's goofball comedy about three guys who spend a decade of their lives "protecting" a Korean bar hostess (Kim Kkobbi) from afar. They're stalkers too, as well as being idiots.

For all its zaniness, with characters bursting into song each episode, "Crazy Ex-Girlfriend" is grounded in co-creator and star Rachel Bloom's real-life struggles with mental illness.