Sarah finds herself in the middle of a hostage situation at a medical testing lab. When the team realizes there's no way inside without aggravating the gunman, Charlies sends Rex in to monitor the situation.

After a reviled restaurateur's food truck explodes, killing one of his employees, Charlie and Rex find themselves with a few too many suspects. A flirtation has Charlie torn between a possible new love interest and Rex, who makes no secret of his feelings on the matter.

With a gallery curator found murdered on his showroom floor and a missing sculpture, Charlie, Rex and Sarah are thrown into the world of high art. Jesse feels the burn when Sarah picks him as her new running buddy.

When an activist is killed during a break-and-enter at a water bottling plant, all evidence points towards his partner-in-crime, but Charlie and Rex aren't convinced.

Cultures clash when the death of a Parisian journalist has Charlie and Rex partnering with a French detective, in an investigation that whisks the team to Saint Pierre and Miquelon.

When a prominent member of an exclusive dating app is found with an arrow through his heart, Charlie is forced to go undercover in the online dating scene.

Charlie and Rex find themselves at the mercy of a dangerous crime kingpin from their past when they enlist his help on a case.

While St. John's celebrates Mardi Gras, Charlie and Rex investigate a targeted killing spree.