When does The Partridge Family return?

The Partridge Family is an American musical sitcom created by Bernard Slade. The series followed the career of a band formed by the titular family, including Shirley (Shirley Jones), Keith (David Cassidy), Laurie (Susan Dey), and Danny (Danny Bonaduce), as well as their manager Reuben Kincaid (Dave Madden) The family was loosely based on the real-life musical family the Cowsills, a popular family pop music group in the late 1960s and early 1970s.
In the pilot episode, a group of musical siblings in the fictional city of San Pueblo, California, (said to be "40 miles from Napa County" in episode 24, "A Partridge By Any Other Name") convince their widowed mother, bank teller Shirley Partridge, to help them out by singing as they record a pop song. After more persuading, Shirley agrees that the family can go on tour. Subsequent episodes usually show the band performing in various venues or in their garage. After the first season, more of the show's action takes place in the family's hometown.