'Supernatural' Recap: Does Gabriel Get Revenge and Help the Winchesters?

Supernatural has impeccable timing. Just as Avengers: Infinity War is hitting theaters, the CW drama introduces its own version of one of the MCU's most notorious characters: Loki. In "Unfinished Business," the show channels Kill Bill, with Gabriel exacting revenge on the Norse demigods who sold him to Asmodeus: Loki and his three sons.