Which American TV show featured a dog called "Freeway"?

Hart to Hart is an American mystery television series which premiered on August 25, 1979, on ABC. The show features Robert Wagner and Stefanie Powers who play Jonathan and Jennifer Hart, a wealthy couple who lead a glamorous jetset lifestyle and regularly find themselves working as amateur detectives in order to solve crimes in which they become embroiled. The series was created by novelist and television writer Sidney Sheldon. The series concluded after five seasons on May 22, 1984.

Jonathan Hart (Robert Wagner) is the CEO of Hart Industries, a Los Angeles-based global conglomerate. His wife Jennifer (Stefanie Powers) is a beautiful freelance journalist. Living the jetset lifestyle, the Harts often find themselves involved in cases of smuggling, theft, corporate and international espionage and, most commonly, murder. At their opulent Bel Air estate, they are assisted by Max (Lionel Stander), their loyal, gravel-voiced butler, cook, and chauffeur who also helps with their cases. The Harts' beloved pet dog is a Löwchen called Freeway, so named because he was a stray that they found wandering on the freeway.