"We did one scene. A big big scene, a sort of six or seven page scene. With lots of the cast in it...."

“We did one scene. A big big scene, a sort of six or seven page scene. With lots of the cast in it. And what we always do is have a, what we call a crew show, where it’s been rehearsed, for most of the morning, and then we show it for the crew before we actually film it. And we did this particular scene and at the end there was a silence. And then everyone just burst into a round of applause. It was extremely affecting and strong stuff, so. Very exciting.”

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Mark Gatiss, SDCC 2016 x (via cupidford)

“With lots of cast in it.” A scene with the boys, Mycroft, and Mary? Or Mycroft, Mrs. Hudson? Something very heavy I bet.