New trailer of 'Sherlock' season 4 released
A new trailer of the fourth season of BBC television series 'Sherlock' has been released. Actor Benedict Cumberbatch will reprise his role as detective 'Sherlock Holmes' while Martin Freeman will portray 'Doctor John Watson'. Also starring Toby Jones, the new season is set to premiere on January 1, 2017, three years after the premiere of season three.