"Sherlock Holmes Season 4" fans could be left hanging in the air if rumors of the show's cancellation are true. Writer Mark Gatiss lamented the busy schedules of lead stars Benedict Cumberbatch who plays Sherlock Holmes, as well as Martin Freeman who plays Dr. Watson, the detective's sidekick.

Gatiss said he has difficulty putting up the next installment in the "Sherlock Holmes Season 4" series due to the busy schedules of its two lead stars. Benedict Cumberbatch has also hinted as early as December last year that this could be the last time he would play the iconic detective.

"I honestly don't know if there will be any more. It's incredibly difficult to get Benedict and Martin's diaries to align," Gatiss said. "And obviously we left it in a very happy place...if that's the end I'd be very happy where we left it."

Managers at the BBC confirmed there is no way for "Sherlock Holmes Season 4" to continue without Benedict Cumberbatch, according to Mirror. Gatiss also said they would not recast the fictional detective role played by the actor. The television series is not only a huge success, but it also paved the way for Cumberbatch's success in Hollywood.

"Sherlock Holmes Season 4" ratings have recently gone down but there are no indications that this could be the reason for the possible cancellation of the show. Benedict Cumberbatch, who became more popular after the showing of "Doctor Strange," said it is difficult to make a follow up of the series finale, according to Mobile & Apps.

Benedict Cumberbatch has a lot on his hands already after "Sherlock Holmes Season 4" He will soon be seen in the Ian McEwan novel-based film "The Child In Time." The 90-minute film will have Cumberbatch as its lead star and executive producer.

The "Sherlock Holmes Season 4" star is also up for "The Current War" where he will play the role of Thomas Edison. The movie features the efforts exerted by George Washington and Thomas Edison in order to come up with a sustainable system of electricity.

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Benedict Cumberbatch, Sherlock holmes, Doctor Strange