Doctor Who: Vastra Investigates - A Christmas Prequel was released on December 17, 2012.

Doctor Who: Vastra Investigates - A Christmas Prequel was directed by John Hayes, Saul Metzstein.

Doctor Who: Vastra Investigates - A Christmas Prequel has a runtime of 3m.

Madame Vastra finishes a case with Scotland Yard, but continues to worry about The Doctor.

The key characters in Doctor Who: Vastra Investigates - A Christmas Prequel are Vastra (Neve McIntosh), Strax (Dan Starkey), Jenny Flint (Catrin Stewart).

Doctor Who: Vastra Investigates - A Christmas Prequel is rated TV-PG.

Doctor Who: Vastra Investigates - A Christmas Prequel is a Short, Comedy, Drama film.

Doctor Who: Vastra Investigates - A Christmas Prequel has an audience rating of 7.4 out of 10.