Supergirl: 1x18
Worlds Finest
Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.
1 - 1Pilot Oct. 26, 2015
1 - 2Stronger Together Nov. 02, 2015
1 - 3Fight or Flight Nov. 09, 2015
1 - 4Livewire Nov. 16, 2015
1 - 5How Does She Do It? Nov. 23, 2015
1 - 6Red Faced Nov. 30, 2015
1 - 7Human for a Day Dec. 07, 2015
1 - 8Hostile Takeover Dec. 14, 2015
1 - 9Blood Bonds Jan. 04, 2016
1 - 10Childish Things Jan. 18, 2016
1 - 11Strange Visitor From Another Planet Jan. 25, 2016
1 - 12Bizarro Feb. 01, 2016
1 - 13For The Girl Who Has Everything Feb. 08, 2016
1 - 14Truth, Justice and the American Way Feb. 22, 2016
1 - 15Solitude Feb. 29, 2016
1 - 16Falling Mar. 14, 2016
1 - 17Manhunter Mar. 21, 2016
1 - 18Worlds Finest Mar. 28, 2016
1 - 19Myriad Apr. 11, 2016
1 - 20Better Angels Apr. 18, 2016