Captain Lash is a 1929 American Synchronized sound adventure drama film directed by John G. Blystone and starring Victor McLaglen, Claire Windsor and Jane Winton.

While the film has no audible dialog, it was released with a synchronized musical score with sound effects using both the sound-on-disc and sound-on-film process.

Lash is the head coal stoker on a steam ship whose shipmates have nicknamed "Captain".

Lash somehow grabs the attention of society dame passenger Cora Nevins.

Nevins is actually a jewel thief who's lifted diamonds from wealthy passenger Arthur Condrax.