Have it and weren't meant to:
Abby and Connor, Primeval
Nick and Stephen, Primeval

Didn't have it and were meant to:
Abby and Stephen, Primeval

Thankfully, the writers have actually realised what wasn't working in one case, so Primeval season 2 forgot all about the Abby/Stephen and went Abby/Connor. And possibly Nick/Stephen, although it's not entirely clear whether that was deliberate or not ::g::