Supergirl S03E07, Kara, J’onn and Winn investigate a crashed spaceship detected beneath National City. They find Mon-El and occupied stasis tanks aboard. They take him back to the DEO
Supergirl S03E02, Supergirl have to fight to a thief, who are with psychic power attacts to save National City. Maggie and Alex have happy time together.
Supergirl is attracted by Manchester Black to Shelley Island, an outsider movement focus and landmark site, where the Children of Liberty confine her and bolt her inside the landmark and set it to explode.
Supergirl S02E14, When Jeremiah Danvers is rescued from Cadmus, Alex and Kara are thrilled to have him back, but Mon-El is suspicious about his sudden return.