Many fans of the SyFy show still want to know why Quentin left The Magicians, as the death of the show's main character in the fourth season was a bold decision — though not one without reason. Based on the trilogy of books by Lev Grossman, The Magicians had a lot of build-up going into the season 4 finale, which ends on a heart-wrenching note, as Quentin, also known as Q, sacrifices himself for his friends — a scene that is beautifully shot, replete with an acoustic rendering of A-Ha’s Take On Me, which lends a somber melancholy to the show’s narrative.

https://screenrant.com/magicians-season-4-quentin-death-reason-explained/