And people have said that this one of Jim in TFP at 38:25 is also fourth-wall breaking, but I don’t consider it this because he’s talking to Mycroft; the camera is where Myc’s shoulder is:
It’s not fourth wall breaking, to me, if the character is talking to another character. Sherlock does it often enough in the series when we are “the deduction wall”, as in when we are watching from the POV of the wall or the monitor. These ones are more noticeable because these are the ACTORS – NOT THE CHARACTERS – LOOKING AT THE CAMERA.
The John one is the most blatant one, I think, because it’s ALL MARTIN, and it’s the LONGEST ONE; HE LITERALLY ACKNOWLEDGES THE CAMERA AND TAKES A SIP OF WINE:
So yeah, gang, please add others if you see them. Remember: they have to NOT be part of the “script” of sorts. Just the actors breaking character and staring at the camera.