My parents love to marathon TV shows. Dexter, Downton Abbey, whatever. They'd never caught BB, but we'd recommended it to them in the past. When the re-air started, I told my dad so he could set the DVR and catch them all from the beginning. They tend to watch 2 or 3 every night or so before bed.
They absolutely love it. Called them last weekend to see how far along they were. "We're in season three. We just watched a whole episode and all it was was just the two of them in the lab with a fly. It was sooooo good!"