Justice League Action Season 1 Episode 50
Keeping Up with the Kryptonians
Mr. Mxyzptlk shows Supergirl and Superman that their innate goodness might not be so pure when he takes them to a parallel world where their counterparts are impossibly aggressive and spoiled.
Guest Stars
Gilbert Gottfried
Mr. Mxyzptlk (voice)
Jason J. Lewis
Superman (voice)
Diedrich Bader
Booster Gold (voice)
Joanne Spracklen
Supergirl (voice)