1. They Looked Like Cops

A museum guard buzzes in two men dressed as cops, who vanish 81 minutes later with a priceless Rembrandt and a dozen other works of art.

3. We've Seen It

Amid apparent sightings of the stolen art, criminal activity connected to organized crime leads to possible perpetrators and a motive for the robbery.

4. $10 Million Reward

An informant and a sting operation open up new avenues in the investigation, which federal agents follow to the home of a small-time mobster.