On Saturdays I don't watch ANY thing on network tv , so I would disable all of them for that night and use the third tuner for more movies I like to record. As for NBC, I already said I don't watch sports , so why fill up my NBC network with shows that will record for hours if there are over runs due to the Olympics being sports. Right now Sports shows run for an hour or more during Sunday nights . I would think that without that network recording it would stop at the regular time at 10:00pm instead of 11:00pm. But I won't know for sure till I get the software for sure.