Charlie needs Rex's nose to investigate suspects including Vicky Harrisson, host of a local morning show, after her media mogul husband Chris was suddenly found dead, peanut being sprayed into the studio air-co to activate his extreme allergy. Son and heir Tad accuses his stepmother, whose record looks like a black widow, so Charlie looks into two previous husbands' deaths. So did private eye David Mason, who was hired by Tad but turns out to be a serial blackmailer, who later gets murdered himself. Rex inadvertently makes himself and Charlie TV stars.
—KGF Vissers