It’s weird when an entire piece of history is forgotten. For more than 25 years, Gertrude Berg was one of the most famous, influential and wealthy women in the United States. She created, starred in and wrote the first successful situation comedy, which she brought to television from radio—and few people now remember her. Unfortunately, Gertrude Berg seems to have been the nicest person on Earth, and much of the film is like watching someone—hands clutched to heart, with stirring music rising in the background—issuing a schmaltzy encomium to an admirable, but ultimately boring individual. However, in the latter part of this documentary, during which Berg comes up against McCarthyism and then fades from public life, some interest is raised. In short: This is an informative but, for much of its length, boring exploration of one of the 20th century’s great, forgotten women.