Actor/writer Mark Gatiss
(The Unquiet Dead, The Crimson Horror, et al
) was a guest on After Who Live
last night, a special live show broadcast on BBC America after Doctor Who, Deep Breath
Upon the mentioning of the "two universes" of Doctor Who
(which Gatiss stars, writes and produces), Mark stated, "which are never going to meet!" Host Chris Hardwick pushed further, asking "Never? They can't?" to be told "No, correct."
showrunner Steven Moffat recently said
that he would be in favour of a crossover, but was being held back by the "killjoys" in his Sherlock