When Moffat just writes a small, self contained episode or two of something, it's generally very good. Examples include The Empty Child/The Doctor Dances, The Girl in the Fireplace, Silence in the Library/Forest of the Dead, Heaven Sent, Extremis, and World Enough and Time. Things tend to go to shit, however, whenever he's writing in aid of a larger story or is given too much freedom and money. This leads to dangerous levels of stupid fanwank and "mystery box" writing. The series reached it's nadir with Hell Bent, a story that was not only bad on it's own, but also took a massive shit on all of the amazing storytelling he'd done in the previous episode, Heaven Sent.Bob_McMillan said:Someone explain to me who Moffat is and why everyone hates him. I think I remember hearing good things about him from friends who like Dr. Who.
Moffat's incoming replacement is Chris Chibnall, a man with an extremely patchy record. His 2008 episode 42 was excellent. After that, it all went downhill. The Hungry Earth/Cold Blood went all to pot in it's second part, Dinosaurs on a Spaceship was forgettable filler, and Power of Three quickly went from fine to shit within it's own 45 minute runtime. His work on Doctor Who spin off Torchwood produced work that was excellent at best and drunkenly awful at worst. His crime series Broadchurch had a really good first series, and then went off the rails in series two.