The Rosetta Stone Episode 19

An argument breaks out at the museum where the Rosetta Stone is kept. Several people from different countries all have different opinions on which country should be the real keepers of the stone. That night, the stone mysteriously floats away like magic into the sky. Moriarty borrows a few tricks from an old Japanese story about a thief to pull off this devious trick. Holmes must stop Moriarty before the professor sells the stone away.