Supergirl Season 1 is a beloved, if uneven, beginning for the character. It gave us Melissa Benoist’s radiant Kara, the late Calista Flockhart’s iconic Cat Grant, and a heartfelt message about hope and identity. But its digital afterlife reminds us that even in a streaming world, perfection is a moving target.

– A volatile media shock-jock transforms into a dangerous electrical villainess.

Supergirl premiered on October 26, 2015, on CBS before moving to The CW for its subsequent seasons, and it ran for six seasons until November 9, 2021. The first season ran until April 18, 2016, and consists of 20 episodes. The series premiere was a massive hit, tying with NBC's Blindspot as the top-rated series premiere of the 2015–16 fall season by attracting .

Unlike individual episode fixes, a typically emerges when a release group discovers a systematic error affecting the entire season. For Supergirl , this happened twice:

– Stress causes Kara to lose control during a military exercise against Red Tornado.

Balancing a date with a city-wide bomb threat.

Fixing delays between actor lip movements and the audio track.