S04E06 of "The Ray Bradbury Theater." A company provides big game hunters with expeditions to the past to kill dinosaurs. They only have one rule that's there to protect the time line: Never get off the beaten path.
When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race. Battling alongside aliens, saboteurs, robot Angels and a new friend called Astrid, can he stop the Christmas inferno?
A small team of scientists must race against time to stop what seems to be a cascade of global disasters signaling the possible apocalypse and end of days.
The Doctor has retired to 1892 London. Despite the protests of his allies, he is determined to keep out of mankind's affairs. However, a governess named Clara has stumbled upon a plot which only the Doctor can unravel, involving the death of her predecessor in ice and the sinister Dr. Simeon, who controls monsters made of sentient snow. And there is another mystery afoot: Clara is the spitting image of Oswin Oswald, whom the Doctor saw die in the Dalek asylum...
The newly-regenerated Doctor arrives in Victorian London, and Clara Oswald struggles to embrace the man he has become. All the while, they reunite with the Paternoster Gang to investigate a series of combustions that have been occurring all around the city.
Sherlock Holmes and Dr. Watson are called in to unravel a mysterious curse that has plagued the Baskerville family for generations. When Sir Charles Baskerville is found dead, his heir, Sir Henry, begs Holmes to save him from the terrifying supernatural hound that has brought fear and death to his household.