"Sherlock" fans have already been treated with the titles of the first two episodes of season three, but the episode three title will take some detective work to solve as BBC repeats series two tonight.

As previously reported, both "The Empty Hearse" and "The Sigh of Three" have been named as the titled for the first two episodes this upcoming season.

The tricky is figuring out whether BBC means the "Sherlock" title sequence, the credits sequence, or the actual titles of the episode itself.

Still, such a spoiler is bound to keep viewing glued to the channel as it begins re-airing series 2 on BBC1 at 8:30pm, according to Radio Times.

A particular note of interest is that "The Sign of Three" will most likely feature Mary Morsten, played by Martin Freeman's (Dr. Watson) real-life romantic partner.

"Working with Martin on 'Sherlock' is really quite inspiring, 'cause he's so good at his job. And he and [Benedict Cumberbatch] have this fantastic chemistry," says the English actress.

"Coming into 'Sherlock' you have to up your game, 'cause they're so good together."

Abbington was recently photographed on set in a wedding dress, so it is all but officially confirmed that she's set to play Morstan. However, Abbington is reportedly sworn to secrecy until the season actually airs.

"Sherlock" season three episodes is currently slated to be released later this year, with the PBS premiere mostly likely in 2014.