ashdflsdh very random but Alex is clearly familiar with James Bond (in fairness hard not to be I suppose), so headcanon one time before Ian got killed Jack and Alex rented a James Bond movie and watched at home and Ian joined them and he couldn't help some eye-rolls or disapproving sounds/laughs at some inaccuracies related to MI6/intelligence and months later Alex suddenly remembers this instance and realises it wasn't just that Ian didn't like James Bond movies lol.

(Another fic I'm really quite fond of but that didn't get as much of a response is Adjournment, my Chess AU/The Queen's Gambit AU fic. Where basically Alex and Yassen are chess rivals, but still share that complicated (family) history through John. It was really fun thinking of how canon events might translate into this world where Yassen still has that edge of danger to him, but he's a killer on the chessboard, rather than in real life.)