for starters channel 7 would sue them. when they purchase a program, they get the EXCLUSIVE rights to it, like the olympics, and if some other network in the same country re broadcasts it without permission, then they must wear the consequences. but in some countries, the rights are split e.g. the u.k. the pay tv channel sky one has rights to the new episodes and repeats, whilst the FTA channel 4 has just repeats rights. it can get really technical, and i cant be bothered writing about it now.