Don Knotts is introduced as Ben's new neighbor Les Calhoun. Les gets mixed up...
Matlock
Season 3 Episode 14: The Thief: Part 1
Coin dealer Mike Koskoff finds that his employee Rob Casey has stolen $40K from him. When Casey is shot, Koskoff is charged and hires Ben. Koskoff's private eye Linda Hansfield gives Ben and Tyler unwanted aid, and makes it tough for Ben.