CBS TV shows "Under the Dome" and "Extant" starring Halle Berry have been picked up for an additional season for next summer. At ABC, its new comedy "Blackish" and the newest drama "How to Get Away with Murder" starring Viola Davis have been given a full season. This spells success for all four shows on network TV.

CBS and ABC announced this week that they would be bringing their popular TV shows back and continuing them respectively. The formula for getting a show renewed, as well as continued includes three items: the amount of viewers watching; the time slot; and the belief by the network in the show.

"Under the Dome" and "Extant" changed summer TV programming. With CBS showing and advertising both shows on the various social media platforms, both TV shows got even more exposure with Amazon, Deadline reported. CBS made a deal with Amazon that resulted in international sales and exposure that catapulted both shows' popularity and visibility.

The demographic numbers for the aforementioned TV shows do not lie. This season's "Under the Dome" viewership was down when compared to Season 1. However, it was still ranked as the No. 1 scripted series with 11 million viewers, Deadline reported. The show averaged at nearly 3 million viewers in the adults 18-49 age group.

"Extant," with its star Halle Berry, also had good viewership numbers. It was averaged at 8.64 million viewers, and almost 2 million viewers within the 18-49 age demographic, Deadline reported.

Another TV show that had a high profile African-American actress was Viola Davis in "How to Get Away with Murder." This ABC drama got a full first season. And an all African-American family "Black-ish," a comedy, also got a full first season on ABC.

"Black-ish" got the typical 22 episodes for its first season, while "How to Get Away with Murder" got 15 episodes for its first season. The 15-episode season is the deal that Davis had signed on for, TV Series Finale reported.

ABC had released a full press release with the viewership numbers. "How to Get Away with Murder" is TV's No. 1 series debut, within two years, in the adults 18-49 age group, TV Series Finale reported. And "Black-ish" opened at No. 2 with its debut, and was the No. 1 new comedy within the same age demographic.

The viewers that saw "Modern Family's" debut had stayed to watch "Black-ish."