Now, this one did make me tear up!
I never really 'got on' with Gwen- I feel a bit like Jack, why didn't he take someone else? Trouble is he knew Gwen was pregnant and if Rhys had offered to go in her stead, he would have left a fatherless child. But, really, why did anyone else have to go? And if they did, there were protective Hazmat suits if Jack and Ianto had taken the time to seek them out in that adjacent room... Sorry, started ranting there!