Robert Trow was best known for his regular role as one of Mister Rogers' neighbors on Mister Rogers' Neighborhood
. He played himself, running a workshop in the real neighborhood. In the show's Neighborhood of Make-Believe segments, he had several roles: the winsome Bob Dog, whimsical Robert Troll, and the puppet character Harriet Elizabeth Cow, who ran a farm and taught schoolchildren.
Years before his start on Mister Rogers' Neighborhood, Trow was a popular radio personality in Pennsylvania. He was married to Lois.