Sherlock actor Rupert Graves recently speculated on what to expect from season 4, regarding his character, Lestrade, specifically.
While we've still got a long way to go for the fourth season of Sherlock, Graves recently spoke with Collider about what might happen with Lestrade and Molly (Louise Brealey).
"I think definitely Lestrade has got the hots for Molly. So maybe they'll develop that. We don't know what happens until we see the scripts, and that could literally be a couple of weeks before you film," Grave admitted.
In fact, Sherlock co-creator Mark Gatiss just finished the first episode of season 4 last month. Gatiss spoke with Entertainment Weekly in December about season 4, teasing a major event to come for the main cast of characters.
"Well, it's some more adventures. Ha ha!" Gatiss quipped, adding: "All I can say is, this is a major, life-changing [season] for the regulars. The repercussions of Moriarty's [Andrew Scott] apparent return are far-reaching. It's very big stuff."
Sherlock season 4 doesn't start filming until later in the year, so don't expect any new episodes for a while. The expected air date is early 2017.
The series was previously on an every-two-years schedule (Season 1 debuted in 2010, season 2 in 2012 and season 3 in 2014), but they won't be able to make that deadline for season 4. However, fans do have the Abominable Bride to obsess over until the expected 2017 premiere date.