Mentioning how ABC was taking a huge risk moving the show to Thursday Nights for the 1979-80 season and the observation turned out to be right. These were the ratings for the first 4 weeks of the 79-80 season

9/13/79-#14
9/20/79-#28
9/27/79-#30
10/4-#28


Surprised they didnt try to move it back after the first month