Just an idea I had as I wondered what happens to the ones who don't die...
"There's someone for you, love," comes the voice at the door. The old man in his bed smiles blankly.
"A visitor, Denis? For me?"
"Isn't that nice, love. I'll let him shall I?"
"Go on then," the old man smiles. He wonders vaguely who it can be…ah well, soon he'll find out. Could be one of Luke's family, finally forgiven him for 'turning Luke.' Could be someone from his life, long, long ago.
"Hello," says the man standing at the door and his accent means…no, it couldn't be…
"What are you doing here?" asks the old man, incredulous.
"How are you?"
"Oh, fine. After I left I got on with my life. I settled down, I lived. I never could do that with you."
"No you're not. I'm sorry. I'm sorry that you can't have a life like I've had."
"We missed you. They wanted me to go after you and apologise-"
"Apologise for what? I wasn't angry. I just wanted something more than you can ever give someone. I wanted a life with someone…"
"They are all dead now. Everyone you knew…I've got a new team."
"But you came to see me?"
"I wanted…to give you this." It's a coffee mug. The old man stares at it before he starts to laugh, a retching laugh that convulses through his body.
"You left it…" Jack explains. "I thought you might miss it…"
"I didn't want anything to do with that life anymore. It was you, but it wasn't your fault…"
"I know…" Jack says.
"Don't be sorry. It's time. I wish you could die…" and it's not said horribly, it's the kindest thing anyone has ever said to him…
"Goodbye, Ianto Jones." Jack leaves and Ianto smiles through his tears and remembers all the times of that life he lived before…
"Who was that?"
"An old friend, Denis…an old friend..." Ianto smiles tiredly and goes to sleep, at last, experiencing the one adventure Jack can never have.