Jack loved the rift. Sure, it sometimes sent all manner of human-hating aliens, strange forces, and well... Jenny crashed through the rift. Jack wasn't sure how to classify Jenny.
Other times, though... Other times, it created clones of people and sent them forward in time. Clones with full memories and emotions and "essense" of the original. Not often, mind you. But sometimes.
Sometimes it returned someone who had been lost, someone missed, someone loved.
Of course, this was difficult to explain to the public, and usually required a new identity.
Jack rolled over and snuggled into Ianto. This time, for once it hadn't been too necessary. And for the first time, Jack hadn't regretted having to do it.
Jack loved the rift.