Sure are! How ever did you know?
Channel 5 used to run CSI, Law&Order and recently also the Shield back to back on saturday nights from 9. Sit back with a few beers, kick my feet up and play "spot the lights" with the added bonus of decent plots too - couldn`t fault it!
Now, the new CSIs will be on tuesdays when I`m work out and tired after work, can drink no beer as I`ve to be up again in the morning, and who knows where the other 2 shows will go
It would be a bemusing and baffling experience to visit inside the mind of a TV scheduler and see exactly what goes on in there...