The Brit covered a wide range of topics, from his role as WikiLeaks founder Julian Assange to his most bizarre fan encounter.
When asked by a fan if Assange's recent letter criticizing the actor's performance in The Fifth Estate caused him to second guess the part, he gave a rather lengthy response.
"Yes, of course it did. To have the man you are about to portray ask you intelligently and politely not to do it gave me real cause for concern, however, it galvanized me into addressing why I was doing this movie," he explained.
"I'm proud to be involved in tackling such a contentious character and script. There is only personal truth in my opinion, and the film should provoke debate and not consensus."
But after Cumberbatch defending his upcoming film role, the conversation took a dramatic turn.
And by dramatic, we mean awesome.
When recalling the weirdest encounter he's had with a fan, he explained:
"Ted Danson at a pre-Oscar party screaming across a floor of people like Leonardo DiCaprio, Ray Liotta, Kirsten Stewart, Kirsten Dunst, et al while pushing past them and knocking their drinks. ‘OH MY GOD! OH MY GOD! It's f--king Sherlock Holmes!"
Get a good mental image of that for one second, let that fully seep in.
But the good times didn't end there.
It seems as though fans are especially enamored by the actor's cheekbones, and made a point several times to mention them.
One Reddit user wrote, "Do you, Matt Smith and Tom Hiddleston have cheek bone polishing parties?"
And then, in true genius Cumberbatch form, he almost broke the Internet with his magical response.
"We like nothing better than buffing our Zygoma," he answered. "And imagining a horny time traveling long overcoat purple scarf wearing super sleuth nordic legend f--k fantasy. Get to work on that, internet."