Fans of the Arrowverse finally witnessed the beginning of the much-hyped Invasion! crossover. "Supergirl's" involvement in the crossover was light, serving only as a starting point for the alien invasion, but a few minutes of Barry Allen (Grant Gustin) and Cisco Ramon (Carlos Valdes) were enough to propel the show to it's highest initial ratings of the eight episodes that have aired on The CW.
The series rating have been on par with the other DC shows on The CW. "Flash" tends to draw the most viewers, with "Arrow" and "Legends of Tomorrow" sharing similar ratings with "Supergirl." The eighth episode of the season, "Medusa," drew a 1.1 rating in the coveted 18-49 demo, meaning 1.1% of people in that age-bracket, with a television, watched the show. It also posted 3.5 million for first day viewers -- its highest since total since leaving CBS and joining The CW, and the highest ratings for any CW series to date this season. Typically the show adds another millions viewers after the three day totals are released.
Given the end of the episode, and it setting up for the first meeting between the majority of the heroes (and anti-heroes) on all four shows, tonight's episode of "The Flash" should perform strongly in the ratings as well. After that, "Supergirl" only has one more episode left, "Supergirl Lives," before the winter hiatus when the show will take a several week break. The title is a reference to the episode's director Kevin Smith, who famously penned an abandoned movie script called "Superman Lives."
Starring Melissa Benoist as the Girl of Steel, “Supergirl” airs Mondays at 8 pm ET/PT on The CW. The series also stars David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers and Jeremy Jordan as Winn Schott and features appearances by Calista Flockhart’s Cat Grant as well as Tyler Hoechlin’s Superman.