Hucklerabbot in the future, Robby and Jack are retired because decades of working in ED has left them physically and mentally completely unwell
First realisation they are really old comes when Jack loses his balance once and falls to the ground and is unable to get back up, and Robby in effort to help him up, throws his back out and they end up having to call an ambulance
Dennis was worried sick, not just for their physical health, two of his most important people were old and not doing well, but he knew very well just how badly mentally they'll take all of this
Soon enough it's not just Jack and his balance issue but Robby too. The man begins to forget things, small and unimportant at first. 'Where are my glasses?' while they sit atop of his head. But then he starts forgetting dates and important anniversaries, something he's never forgotten before.
And then he gets hit with the Alzheimer's diagnosis and is devastated and so is Jack and Dennis.
Dennis would never admit to anyone out loud that he's terrified of losing them both, and that it'll happen sooner than he'd like, and that he's crying himself to sleep almost daily, staying awake long after the two of them fall asleep, trying to get as much time with them as possible.
But strangely enough, they make it all work in their own bubble, their own way. Robby is helping Jack with his balance and Jack is helping Robby with his memory.
Casual walks outside, Robby pushing Jack in his wheelchair while the man is pointing out places they've been to.
"Remember when we..."
"No, not really."
"Well I do and you loved every second of it."
And although Robby doesn't remember it, he knows it's true because he knows Jack.
Until one day he doesn't know him, doesn't recognise him. Doesn't recognise Dennis either. Who are these two men and why are they at his place?
And then he begins to roam the place in middle of the night, rearranging things because they were not right and he didn't leave it that way. And it escalates, he begins to roam outside their house, and then forgets how to get home. Police brings him back and when he does remember who he is and where he lives and who his two boyfriends are, he's crying because these memory lapses are horrible and he'd rather be dead.
Eventually Robby starts to wander further, finding his place back to the PTMC and nothing is the way it used to be, nobody knows him, they see this old confused man roaming the hallways, until Dennis, the current attending, informs everyone Robby used to work there before the new generation took over and he's struggling to keep away even in his condition.
But he causes no harm and actually being back at the Pitt is great excercise for his brain because he's helping the med students with hard diagnosis.
It's slow, agonising watch but when it's time to go, it's time to go and Robby passes away at home, in his own bed, snuggled up to his boys and Jack follows him year later, leaving Dennis all alone and heartbroken but grateful for all the amazing memories they shared together during their lives.
And he'll always have something to remember them by, tattoo of Robby's Memento Mori and Jack's dogtags number.
