Enterprise: Terra Prime. Parts 1 and 2.
The only thing that bothered me was after Phlox said that the DNA sample was from an offspring of TPol and Trip. TPol says that she's never been pregnant. And no one, especially Phlox or TPol conclude that obviously someone has acquired samples of TPol's and Trip's DNA. Haven't these people ever heard of artificial insemination or cloning? They milk the whole "TPol must be lying" thing way too long.