'Sherlock' Returns In First Teaser Trailer For Season 3

We've been waiting a long time for this.

BBC One has revealed the first teaser trailer for season 3 of "Sherlock."

We see a glimpse of a few of the characters — Martin Freeman (John) is showing off a mustache — but don't expect much more.

Just hearing the theme song gets us excited.

Last week, it was revealed that Lars Mikkelsen will join the cast as a new nemesis for Sherlock (Benedict Cumberbatch).

Season 3 of "Sherlock" is expected to air in the U.K. later this year while a U.S. premiere date is set for 2014.

The following trailer was accompanied by the teaser line: "Sherlock returns but will things ever be the same again?"