Iris knows because in six years, the ones she has loved and lost now take up two memorial corkboards in her cabin.

"Not always. But a lot of 'em do. My Vic didn't come back for a year, but a lot of 'em come back inside a few weeks."

She puts her arm around Caitlin's shoulders, gently steering her for the Lounge.

"I sort of hate to try and give you hope. In some ways that just hurts worse, I know. But there is hope. 'E's not dead in'is own reality, is 'e?"