Whodunnit? That's what many fans are asking after the first star-studded trailer for "Murder on the Orient Express," but they don't mean the murder.

Instead, after admiring the cast and mystery set-up, many viewers are wondering who decided Imagine Dragons's "Believer" was a fitting song choice for an Agatha Christie adaptation set in the early 20th century.

Or, as one put it in Collider's comments, "I could care less about who the murderer in the film is, I just want to know the murderer to my ears who thought that this trailer needed Imagine Dragons to catch the viewers attention. Who the f*ck thought that was a good idea?!?"

Ah, mon ami. That is the true mystery.There are also questions about director Kenneth Branagh's facial hair and strong accent as Hercule Poirot, but that's just Branagh being Branagh. He'll chew the scenery the whole time. Just let him have his fun.

But these questions distract from the murder mystery, which -- conspiracy! -- may have been the whole point. 'Cause otherwise people might just go and read the book for spoilers, or go back to complaining about Johnny Depp. (Some fans are pleased that he seems to be the movie's victim, which is problematic on its own.)

Anyway, music aside, the trailer has us hooked. Here it is, complete with handy graphics to let us know who is who:And here's the synopsis:

What starts out as a lavish train ride through Europe quickly unfolds into one of the most stylish, suspenseful and thrilling mysteries ever told. From the novel by best selling author Agatha Christie, "Murder on the Orient Express" tells the tale of thirteen strangers stranded on a train, where everyone's a suspect. One man must race against time to solve the puzzle before the murderer strikes again.

The full A-list cast includes Tom Bateman, Kenneth Branagh, Penélope Cruz, Willem Dafoe, Judi Dench, Johnny Depp, Josh Gad, Derek Jacobi, Leslie Odom, Jr., Michelle Pfeiffer, Daisy Ridley, Marwan Kenzari, Olivia Colman, Lucy Boynton, Manuel Garcia-Rulfo, and Sergei Polunin.

"Murder on the Orient Express" opens in theaters November 10.

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