He-Man and the Masters of the Universe (1983)

S1E47 Trouble in Arcadia

Adam and Teela discover the secretive city of Arcadia, where women enjoy a life of luxury while men toil away as slaves in the mines below. Adam finds himself sent to work in the mines, while Teela is welcomed into the community of women. She must now demonstrate the need for gender equality and persuade the queen, Sumana, to recognize her misguided beliefs. Meanwhile, Adam faces challenges underground as a group of miners seize his sword, planning to destroy it in the furnace.