Complex sentence: Domestically, the change of format seemed to produce diminishing returns for ITV; series three was abruptly taken off air by the network midway through the run, only to return a few weeks later.
Split into simpler sentences: Domestically, the change of format seemed to produce diminishing returns for ITV. The third series three was abruptly taken off air by the network midway through the run, only to return a few weeks later.