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Keifallen
avclub-cc50bf5675ad6320fa25cf2106ee6d9e--disqus

Distinct possibility!
Steven Moffat was the Exec Producer on that Ep of Doctor Who and him, along with Mark Gatiss (who's also written episodes for Doctor Who) are the writers/showrunners for Sherlock. Wouldn't be to far of a stretch for the idea to have come from that episode would it.