Except that Moffat and company planned around the "Hobbit" and "Star Trek: Into Darkness" schedules, which is why they're shooting "Sherlock Series 3" after production wraps on Doctor Who's 50th Anniversary special.
No, there's going to be Sherlock
overlap. The Who
anniversary special shoots in April. Sherlock
III starts filming in March and will wrap in mid-May because Freeman goes back to New Zealand for Hobbit
reshoots at the end of May.