ByAlya Stationwala, writer at Creators.co
Alya Stationwala

The BBC's Sherlock has won plenty of critical acclaim alongside love from fans, and that was on full display during the program's panel this weekend at San Diego Comic-Con 2016. The cast, including Benedict Cumberbatch (Sherlock Holmes), Amanda Abbington (Mary Watson) and Mark Gatiss (Mycroft Holmes) appeared alongside producers Steven Moffat and Sue Vertue to prep fans for Season 4, and thankfully they brought along a killer new trailer for us to enjoy.

The teaser featured plenty of tense action and mysterious clues of what's to come in the upcoming series. And it was so awesome, that you might not have noticed everything that happened. So, let's take a closer look to see what you might have missed in the Sherlock Season 4 teaser.

1. Who's In The Hospital?

John Watson, Martin Freeman
John Watson, Martin Freeman

One of the first things seen in the teaser is someone standing in front of a hospital bed. Based on the silhouette we can easily rule out most of the characters, leaving Martin Freeman's John Watson as the most plausible figure in front of the bed. Now, who could be the mysterious person laying in the bed?

It could be Sherlock, especially if the series takes inspiration from The Adventure of the Dying Detective. In this tale, Sherlock dupes Culverton Smith (played by Toby Jones in the show) into believing he poisoned the great Holmes. It would also be interesting if it's Mary Watson. John loves her more than anyone else, so it would be particularly tough on the character for her to fall ill or get hurt.

2. The Return Of The Swimming Pool

Sherlock Holmes, Benedict Cumberbatch
Sherlock Holmes, Benedict Cumberbatch

Since the finale of Season 1, The Great Game, Sherlock and John haven't been to a pool. Of course, fans will remember that the evil James Moriarty (Andrew Scott) made his first appearance by threatening John's life at a swimming pool. Now, yet again, Sherlock finds himself at a pool in the dark to meet whom? Maybe Moriarty. In recent set pictures, actor Andrew Scott was scene walking across a beach from his helicopter. Though this could easily be a flashback, the reappearance of a pool leads one to wonder, maybe he is back. You have to admit, you did miss him.

3. Bill Wiggins

Bill Wiggins, Tom Brooke
Bill Wiggins, Tom Brooke

When Sherlock went "undercover" in a drug den as Shezza, there was one character who came out of the den with him — Bill Wiggins. The seemingly innocent Wiggins was a surprisingly intellectual druggy with impressive powers of deduction. This lead many fans to believe that Bill is the third Holmes brother that was mentioned by Mycroft in "His Last Vow."

With the establishment of Sherrinford as one of the three names that are pertinent to the new season and the return of Bill Wiggins, this idea may just be right. Sherrinford is known as the name of the third Holmes brother, though not in the Doyle tales. Originally the name was considered as a possible name for Sherlock Holmes. Later on, Sherlock scholar William Stuart Baring-Gould used Sherrinford as the persona of the eldest of the Holmes brothers.

Mycroft Holmes, His Last Vow
Mycroft Holmes, His Last Vow

4. A.G.R.A.

Mary Watson, Amanda Abbington
Mary Watson, Amanda Abbington

Blonde to brunette? In the trailer, Mary Watson can be seen in a scarf with a gun, sporting a new hairdo. As usual, nobody knows what is happening, so what could this mean?

As we know from His Last Vow, Mary has a much darker past than originally thought. Also known as "A.G.R.A.," Mary was a past CIA agent, and a pretty fearsome one at that. So, now with a gun in hand, one can only imagine what this could suggest. Maybe we get a A.G.R.A. flashback as we learn more about the past of our favorite characters. Maybe the big villainous showdown brings a little A.G.R.A. back into play as she fights for Sherlock and Watson. Either way, we are bound to experience some intense female badassery in the new season.

5. 'Get Out Of My House, You Reptile'

Mrs.Hudson (Stubbs), Mycroft Holmes (Gatiss)
Mrs.Hudson (Stubbs), Mycroft Holmes (Gatiss)

Mrs. Hudson, the sweet little old landlady of 221B has gone sour! Never known to start a fight, Martha Hudson seems to have changed in the new season, or is it just within the circumstances? Always protective of her boys John and Sherlock, she is bound to get a little angry when someone brings pain to them. Who would have thought that it would be Mycroft Holmes, the loving sibling of Sherlock, who risked his career to protect his little brother? Though he does have his moments that are not quite cordial, how much of a snake can Mycroft really be? He did once let his brother be beat to a pulp despite the fact he could have stopped it at any time though ("The Empty Hearse").

For now, Sherlockians can only attempt to deduce events from the things that the creators give us throughout the hiatus. Are you excited for Sherlock Season 4? Let me know in the comments.

>