It's no secret that Doctor Who and Sherlock showrunner Steven Moffat doesn't want any crossovers between his two successful shows. However, there's one who disagrees with Moffat, and that's the Eleventh Doctor himself, Matt Smith.
When asked by Collider if his Time Lord should ever meet with Benedict Cumberbatch's very Who-like hero Sherlock Holmes, Smith said:
"I'm not averse to it. I'm kind of open. I'm like yeah, because I just think they would find each other so remarkable."
Smith stressed the fact that Sherlock co-creators Steven Moffat and Mark Gatiss were both strongly against it, saying:
"I think Mark and Steven kind of hate the idea of Doctor Who and Sherlock ever meeting."
Smith also said, about whether his Doctor could walk into an episode of Sherlock, that:
"Doctor Who could, but it's just nah, it's you know..."
However, the idea of meeting up with Martin Freeman's Dr. John Watson (Smith once auditioned for the role, before he won the part of our beloved Time Lord) amused him:
"The Doctor with Watson, he'd be like, 'Cheer up mate. It's not that bad, I know you're really clever, but there's an alien over there, let's go and talk. He's got wiggly bits on'."
How would you find the idea of the Doctor ever meeting up with Sherlock and Watson?