
This could have been a great episode. I loved the idea of the seven day war and the concept of two opposing armies, continuously being recreated, for the sole purpose of fighting a never ending war. I also liked the idea of the progenation machine taking the Doctor's diploid cells, splitting them into haploids and then recombining them to form Jenny—the Doctor's daughter. But the episode just wasn't long enough to do all of the plot elements justice. They should have either made it a two-parter, or shaved off some of the unnecessary plot divergences. It may have felt less rushed that way.