Sherlock: The Queen's Eye

The Queen's Eye is the second one-off special of the BBC series Sherlock and the only episode to air in 2019. It features the return of primary main cast of Benedict Cumberbatch as Sherlock Holmes, Martin Freeman as Dr. John Watson, Mark Gatiss as Mycroft Holmes, Una Stubbs as Mrs. Martha Hudson and Louise Brealey as Molly Hooper. It is notably the first Sherlock episode to feature a real life person in a large capacity in the form of Sian Phillips portraying Queen Elizabeth II.

Production
Sherlock 's fourth series ended in early 2017 and the future was left undetermined. However, at San Diego Comic Con 2017 it was confirmed the show would return, first for one episode in early 2019 and again in early 2020 for a further 3 episodes. Production on the special began in Spring 2018 and concluded after six weeks. All main cast members from series 4 were confirmed for the special apart from Amanda Abbington, who confirmed she would not be returning.

Cast
Benedict Cumberbatch as Sherlock Holmes

Martin Freeman as Dr. John Watson

Mark Gatiss as Mycroft Holmes

Una Stubbs as Mrs. Martha Hudson

Louise Brealey as Molly Hooper

Sian Phillips as Queen Elizabeth II

Lara Pulver as Irene Adler

Sian Brooke as Eurus Holmes

Wanda Ventham as Mrs. Holmes

Timothy Carlton as Mr. Holmes

Catherine Tate as Harriet 'Harry' Watson

Synopsis
Sherlock Holmes (Benedict Cumberbatch) is spending New Year's Eve at the island prison of Sherrinford with his family as Mrs. Holmes' (Wanda Ventham) health declines and she wants her family (Timothy Carlton, Mark Gatiss, Sian Brooke) around her. Upon returning home the following day, Holmes finds a rather surprising guest in his living room being served tea by Mrs. Hudson (Una Stubbs) - The Queen (Sian Phillips), who poses a difficult conundrum to the detective that may require the help of some old friends and enemies. Under pressure from the monarchy, Sherlock and John draft in an expert team, including Molly Hooper (Louise Brealey), Eurus and Mycroft Holmes, Harriet Watson (Catherine Tate) and The Woman herself, Irene Adler (Lara Pulver) but Sherlock must find the mole amongst them before time runs out.