Supergirl (2015)

S6E11 Mxy in the Middle

Title: Mxy in the Middle Plot: Supergirl and her allies race against time to thwart Nyxly's plan to eliminate Mr. Mxyzptlk, a figure from Supergirl's history. Mxy makes his entrance, revealing Nyxly's ominous backstory through an entertaining musical number. Simultaneously, Lena travels to Newfoundland to explore her mother's roots, but she is taken aback by the cold welcome she receives from the local community.