Elementary, my dear Watson. It all comes down to scheduling.

The famed British detective Sherlock Holmes and his sidekick could be returning to the big screen, provided producers can figure out a time when its star, Robert Downey Jr., isn’t busy. And that’s a tall order. Producer Joel Silver revealed this news in an interview with Collider.

“It looks like it could happen this fall. Downey said he wants to do it. He’s gotta launch into another Avengers movie, right after the New Year, so we’re trying to get it done,” Silver said. “We have a script that we like. Jude [Law] is available and Downey is available, and we’re hoping we can get it done. If it works, great. If not, we’ll do it another time. But, it looks like it could happen now.”

The two Sherlock movies have grossed more than $1 billion worldwide. But after releasing two films in two years, it’s been on hiatus since 2011. Silver adds that he sees a bright future for the sleuth, whether with RDJ or someone else on the other side of the magnifying glass.

“I hope [it’s not the last one]. I don’t think so. How many Bond films have they made? As long as there’s a character, we can work with it. It’s not an end story. We can keep going, as long as people want to do it,” he said.

David Eckstein is a writer living in Los Angeles.