Sherlock Holmes' return met by mixed reaction from fans
2 January 2014 Last updated at 12:10 GMT
After two years of waiting, Sherlock fans finally got to see how the great detective faked his own death - sort of.
9.2 million people tuned in to the episode, which offered fans several versions of how Holmes survived a fall from a building.
However David Mather, who runs fan site Sherlockology, told BBC Radio 5 live's Victoria Derbyshire he was inundated with mixed responses from fans.
The next episode is due to air on BBC One on Sunday night.