The future of the BBC series, "Sherlock" seems dimmer when co-creator and actor Mark Gatiss revealed the reasons why season 5 may not happen. As fans lost their hope to see their favorite detective once more, speculations claim that a higher season 4 rating might have ensured the show's renewal.

Gatiss who co-created "Sherlock" and who acts as Mycroft recently is not so keen about a future renewal of the show. There were several factors he pointed out that might affect the show's renewal, revealing that Benedict Cumberbatch and Martin Freeman are currently busy with their Marvel projects that they might not insert another installment on their schedule. "I honestly don't know if there will be anymore. It's incredibly difficult to get Benedict and Martin's diaries to align," Gatiss told in an interview.

Furthermore, he affirmed the previous statement of showrunner Steven Moffat as well as most of the actors of "Sherlock" saying that season 4 ended well and the characters were all placed in a happy place. He also said that he would be happy to leave the series where it ended, which is the same insight that lead actor Cumberbatch said after "Sherlock" season 4 ended.

Earlier, though, Moffat, Cumberbatch, and Freeman said that "Sherlock" season 4 is not the series' definitive end as it left a door open for new storylines. Moffat also shared that the finale of season 4 is not the end, but just the end of an idea as there are still a lot of story arcs that can be touched for possible new seasons.

Fans then are speculating that a higher rating of "Sherlock" season 4 might have motivated the actors to return and for BBC to pick up the show for season 5. "Sherlock" season 4 remained to be critically loved by the U.K. fans, but its U.S. viewers dropped to a significant amount. Fans also remain to be hopeful, as they wish to see more of "Sherlock" when Cumberbatch and Freeman can already free their schedules.