"Eran Trece" has obvious novelty value - a Charlie Chan movie entirely in Spanish! - but beyond that, it's a pretty good little mystery on its own; it certainly looks good and moves well for a 1931 production. However, it goes on too long (for example, the entire "impressions at the party" sequence could have been cut), and - as in many later Chan pictures - the killer seems to be picked out of a lottery; there are no particular clues to indicate that it has to be person A instead of person B or person C. **1/2 out of 4.