I thought it was good beginners guide to horror for the uninitiated.
However I was disappointed that Gatiss made Hammer out to be just churning out Frankenstein and Dracula, amongst a few other things, when in fact they did more than that during the 60s and 70s, for example:
One Million BC, When Dinosaurs Ruled the Earth, Paranoiac, Scream of Fear, The Abominable Snowman, The Mummy, Two Faces of Dr. Jekyll, Nightmare, Captain Clegg (aka Night Creatures), The Phantom of the Opera, The Gorgon, Kiss of the Vampire, The Nanny, She, Rasputin the Mad Monk, The Witches, The Anniversary, The Devil Rides Out (shockingly not mentioned), Hands of the Ripper, Fear of the Night, Straight on till Morning, etc.
Same with Amicus apart from Dr. Terror's House of Horror, and Tales from the Crypt, they also did Dr. Who and the Daleks/Daleks - Invasion Earth 2150 AD
The Skull, Torture Garden, The House That Dripped Blood, I, Monster, And Now the Screaming Starts! Vault of Horror, The Beast Must Die, Madhouse, The Land That Time Forgot, At the Earth's Core, The People That Time Forgot, which like Hammer are all on dvd.
As with Tigon, The Sorcerers, Curse of the Crimson Altar, The Blood Beast Terror, Doomwatch, Virgin Witch, The Creeping Flesh. They did a few more horror films but they were awful.
I was surprised Peter Walker didn't even get a mention for his contribution to the 70s British horror movies.
Speaking of 70s horror movies, Wes Craven and his controversial movie The Last House on the Left, as well as The Hills Have Eyes wasn't acknowledged, and neither was Brian De Palma with his adaptation of Stephen King's classic Carrie, or his other horror movies Sisters, and The Fury.
Other omissions were Herzog's Nosferatu, Don Coscarelli's low budget cult classic Phantasm, Ridley Scott's sci fi horror classic Alien, as well as Italy's contribution to horror genre with their Giallo movies, which gave us Argento, and Fulci.
I fail to see why he didn't do another episode mentioning the 80's horror films, as they introduced us to even more great directors such as Sam Raimi, Joe Dante, Stuart Gordon, etc, especially in an article he mentions Evil Dead 2 being is favourite.
Like I said it's a good documentary for people just getting in to horror, but someone like Kim Newman, or Mark Kermode would be a better choice to take it one step further, as I'm sure they know some great unknown horror movies.