Honestly the biggest indicator of the extent of John’s grief, his hurt, after Reichenbach, is the way he didn’t speak to Mrs Hudson, instead opting to “let it all slide”.

(This is the woman who’d gone from “I’m not your housekeeper” in ASIP to “I’m not your mother” in TEH.)

Literally shutting the door on part of your life like that is a symptom of trauma denial – of fleeing what you’ve been through – rather than any kind of processing of grief; and he’s a doctor. He must know that. (What’s more, he’s a doctor who’s seen a therapist for trauma.)

John didn’t process a thing. He shut the door behind him at 221 Baker Street, and didn’t speak to Mrs Hudson, and drank (MHR), and found a new person to forget with.

Seriously, Greg’s expression in this part where the old lady gets blown up. He knows exactly what hearing that will be doing to Sherlock – even better than John, perhaps, in this episode where John and Sherlock are all at sixes and sevens.

Imagine being Greg in ASIP

“She’s been married for at least ten years, but not happily. She’s had a string of lovers but none of them knew she was married.”

“Oh for God’s sake, if you’re just making this up
–”

“Her wedding ring. Ten years old at least. The rest of her jewellery has been regularly cleaned, but not her wedding ring. State of her marriage right there. The inside is shinier than the outside. That means it’s regularly removed
– the only polishing it gets is when she works it off her finger.”

Remembering the bright inner glint of gold when his wife had taken her rings off to clean the bathroom

The dull shine when they are on her finger

The sinking feeling. The knowledge that it’s happening again