 On his return to New York City, he studied at The Actors Studio.He made his television debut in silent walk-on parts in two episodes of the Gothic daytime soap opera "Dark Shadows" on ABC in 1968, but did not garner fame until "Rhoda".Groh co-starred in the sitcom "Rhoda" in which he played Joe Gerard, a New York City building demolition company owner who met and married Rhoda Morgenstern, the best friend of Mary Richards from CBS's "The Mary Tyler Moore Show".