'Sherlock' Season 4 Air Date, News & Spoilers: Holmes Terrorized By Moriarty? S4 Is ‘End Of The Universe?’ Key Character To Die?

Filming for "Sherlock Season 4" has completed and fans will soon know just how terrorized Holmes (Benedict Cumberbatch) is by James Moriarty (Andrew Scott). Interestingly Benedict Cumberbatch links Season 4 of "Sherlock" to the universe's end.

"Sherlock Season 4" has more than a few theories going. Among these are the resurfacing of Redbeard, which may not refer to the childhood pet Sherlock had but to the third Holmes brother as Parent Herald cites

It's a WRAP on #sherlock series IV 2016 https://t.co/54071E7BDu

— Benjamin Caron (@benjamincaron) August 5, 2016

  Also buzzed is an actual return by James Moriarty in "Sherlock Season 4" despite the fact that Holmes' arch nemesis is supposed to be dead. Benedict Cumberbatch addressed the James Moriarty theory in his interview with Collider.

The Game is over...for now. #Sherlock pic.twitter.com/CyYnQsv6yj — Mark Gatiss (@Markgatiss) August 5, 2016

According to Benedict Cumberbatch, Holmes met his match in James Moriarty. Although "Sherlock Season 3" confirmed the death of Jame Moriarty, Benedict Cumberbatch says that this villain lives on in Holmes' fears.

Revealing how James Moriarty will continue to exist in "Sherlock Season 4," Benedict Cumberbatch more or less confirmed that he will continue to be confined in Holmes' mind. "He's terrorized Sherlock's mind," Benedict Cumberbatch stated.

This indicates that, as with the "Abominable Bride," "Sherlock Season 4" will play out key scenes that only exist in Holmes psychology. Masking which ones these are will be the fun that "Sherlock Season 4" will have with the viewers.

Continuing his description of what the audience can expect from "Sherlock Season 4," Benedict Cumberbatch parallels Holmes' experience to the darkness of the end of the universe. To be sure, Holmes will have the biggest challenges in "Sherlock Season 4," in no small part due to Culverton Smith (Toby Jones).

It does not help that co-writers Steven Moffat and Mark Gatiss (Mycroft Holmes) and the "Sherlock" cast iterated a few times that Season 4 will be tragic. This united declaration can only mean that a key character in "Sherlock Season 4" will die.

A few theories point to Mary Watson (Amanda Abbington) as the "Sherlock Season 4" casualty. Parent Herald cites theories that Mycroft Holmes may be the one to say farewell in "Sherlock Season 4."

BBC is expected to bring the "Sherlock Season 4" premiere to screens in January 2017. How do you think James Moriarty will manifest at "Sherlock Season 4" and which key character do you believe is in real danger at S4?