1978
The original Star Trek aired on NBC.
120 with 4 seasons
Yes. Actually, all six seasons (the last season wasn't aired originally) are on Netflix.
The duration of NHL on CBS is 3 hours.
21 Seasons have aired on CBS. The 22nd is currently underway.
The first episode of the CBS drama, Early Edition, was aired on September 28, 1996. The Early Edition aired it's last show on May 27, 2000. In 2008 and 09 the first and second seasons were released on DVD.
As of May 2011, all 22 seasons of Survivor have been broadcast through CBS for United States viewers to watch.
The popular CBS reality show, Survivor, is currently in its 26th season. It first aired in 2000, and is currently still going strong and has been renewed for its 27th season.
desilu, aired on cbs Star Trek originally aired on NBC, not CBS.
The television Western, Rawhide, ran from 1959 until 1966 (8 seasons) on CBS. They produced 217 episodes which were aired on Friday nights, except for the last season which aired on Tuesdays.
As of June 2015, 25 seasons have aired.
It was shown live on the CBS network on February 3, 2013.
There have been literally thousands of American TV drama series that have aired on CBS. You'll have to be more specific.
1978
CBS
To answer your question a total of 4 seasons have aired and season 5 started last weekend.