One family drama’s success was literally another family drama’s failure when The WB decided to un-cancel "7th Heaven" — which had days earlier aired a well-promoted “series finale” — and instead boot the Browns, as the netlet merged with UPN to become The CW.

“We’re launching a new network, we wanted to have the best shot we could,” CW boss Dawn Ostroff told Michael Ausiello at the time. “Not only for the new network, but also for "Runaway", which is a family drama.”

(By the way, that "Runaway" aired three times before getting yanked. #Irony)

https://tvline.com/gallery/tv-shows-cancelled-for-dumb-reasons/#!7/everwood-pilot-4/