The strike in 1967 was against the American Federation of Television and radio Artists which went from March 29th-April 11th. The networks headed up by NBC, turned down the unions demands of more pay for newsmen in New York, Chicago and Los Angeles, to place standby announcers on FM radio stations, and to reject the rules that announcers had to retire at 65.
Soaps and other programs including Johnny Carson used reruns of past episodes and Carson was pissed off at NBC for using old Tonight Shows from Christmas 1966 ,and Johnny threatened to quit The Tonight Show and had that happened, NBC would have put Bob Newhart in the chair. Johnny did return on May 1, 1967 two weeks after ABC introduced The Joey Bishop Show with Regis Philbin as Joey's version of Ed Mc Mahon.
I remember when a CBS staffer named Arnold Zenker filled in for Walter Cronkite on The CBS Evening News, and Zenker did so well after filling in on a local broadcast. On NBC, Chet Huntley worked as did Frank Mc Gee, while David Brinkley did not, and Peter Jennings on ABC stayed home. I saw Jennings striking in front of ABC with Howard Cosell, and a child getting an autograph from Edwin Newman of NBC. When Cronkite came back, his first words were , "Good Evening, This is Walter Cronkite, sitting in for Arnold Zenker".
As for the 1980 strike against AFTRA and the Screen Actors' Guild ,both ABC and CBS used reruns , and Fred Silverman at NBC used fresh episodes of some shows like Little House On The Prairie, Quincy and Real People ,along with an updated version of The Flintstones, the mini-series Shogun, with Richard Chamberlain and the 1980 World Series. Shogun was seen by 125 million people and Johnny Carson joked , "Do you realize that's the same amount of people that turned off "Supertrain""?.
Guys and gals, do you think there will ever be another SAG and/or AFTRA strike in this day and age of the internet, IPODS and DVDs?.