LAREDO was a humorous oater lasting two seasons and 56 episodes on NBC, the central trio of Texas Rangers featuring Neville Brand as Reese Bennett, LAWMAN's Peter Brown as Chad Cooper, and William Smith as Joe Riley, commanded by Philip Carey as Captain Edward Parmalee. "Sound of Terror" guest stars the legendary John Carradine as Professor Paracelsus Smythe, proprietor of a traveling Chamber of Horrors, also boasting the one time only presence of soon to be STAR TREK Chief Surgeon DeForest Kelley fittingly cast as town physician Dr. David Ingram. The thrust of this gloomy story is driven by Tom Simcox as Shamus McCloud, newly arrived in Laredo with knife grinder Ernie Venner (Kay E. Kuter), who learns of his brother's unexpected demise from Dr. Ingram, who kept it quiet to prevent a cholera panic. Reese Bennett is forced to intercede when McCloud makes clear his displeasure with the doctor's diagnosis, and before dawn Ingram finds his dog strangled to death and eager to blame his Irish assailant. Joe Riley also has his problems, threatened by card cheat Spence Gillis (Harry Lauter), in a hurry to collect and move on to more pigeons, later found strangled with every penny still untouched in his wallet. Riley's annoyance with Gillis' whistling puts him down as a suspect, the dog's howling placed him in danger, a tea kettle and a flute signaling more mayhem, to the chagrin of Carradine's Prof. Smythe, admitting that business has been disappointing since he arrived: "who is interested in the great crimes of the past when they are part of one in the here and now!" A Western whodunit tinged with horror is not a bad idea, but Kelley's short tempered doctor and Carradine's general lack of involvement help this peter out before the climax.