david tennant steven moffat doctor who gi BBC considered ending 'Doctor Who' when David Tennant left, says Steven Moffat

What if “Doctor Who” had ended when David Tennant decided to leave the show in 2009? According to showrunner Steven Moffat, that scary possibility was a lot more realistic than you might think.
Speaking at the Hay Literary Festival (via Doctor Who TV), Moffat says, “David owned that role in a spectacular way, gave it an all-new cheeky sexy performance and became a national treasure. And he didn’t do it instantly, he did it over time. So the idea that ‘Doctor Who’ could go on at all in the absence of David was a huge question.”
He continues, “I didn’t realize how many people thought it wouldn’t succeed at all. That was quite terrifying when I found out about it later.” Though he says “there were plans maybe to consider ending it,” Moffat credits one man with saving the day. “It was [former showrunner] Russell T. Davies saying ‘you are not allowed to end it’,” he reveals.
All Whovians owe Davies even more gratitude than they did before. Without him, the Doctor may be a distant memory by now.