Trivia: MacKenzie Phillips is the daughter of "The Mamas & the Papas" lead singer John Phillips, the stepdaughter of actress Michelle Phillips,and the half-sister of another film performer, Chynna Phillips. MacKenzie was 13 years old when she essayed her first film role as underaged "cruiser" Carol in American Graffiti (1973). She then essayed a series of juvenile-delinquent TV guest spots, which ended in 1975 upon her being cast as Julie Cooper on the popular sitcom One Day at a Time. During the run of this series, MacKenzie accepted a few outside assignments, notably a cameo as Lillian Gish (whom she closely resembled) in the made-for-TV The Silent Lovers (1980). Drug problems and run-ins with the law compromised MacKenzie's ability to function on One Day at a Time, culminating in her being fired during the 1979-80 season. After going "cold turkey," MacKenzie Phillips briefly returned to the series in 1981, but her previous self-destructive lifestyle had taken its toll on her physical and emotional makeup; she left One Day for good in 1983, and has worked but little since.

Trivia: During her nine-year (1975-1984) tenure as Barbara Cooper on TV's One Day at a Time, Valerie Bertinelli grew from a chubby, awkward 15-year-old with only a smattering of bit-part credits into a polished actress and bona fide sex symbol. When Bertinelli "married" her One Day co-star Boyd Gaines in a 1982 episode, the ratings went through the roof, while many a male viewer's heart sank. One year earlier, Bertinelli had been a bride for real; her marriage to rock star Eddie Van Halen was kept under wraps by the series' producers for fear of damaging the actress' "Little Miss Perfect" image. Bertinelli's son by Van Halen was named Wolfgang, as in Mozart. While still a One Day regular, Bertinelli made the first of many TV-movie starring appearances in 1979's Young Love, First Love; later small-screen projects -- most of them packaged by Bertinelli's own production company, Bertinelli Inc. -- included The Princess and the Cabbie (1981), I Was a Mail Order Bride (1982), Shattered Vows (1984), The Seduction of Gina (1984), Silent Witness (1985), and Pancho Barnes (1988). Conversely, her theatrical-feature credits are limited, but include C.H.O.M.P.S. (1979) and Ordinary Heroes (1985). In the years since One Day at a Time, Valerie Bertinelli has starred in the short-lived TV series, Sydney (1990) and Café Americain (1993).At the beginning of the 2000s, she landed a recurring role on Touched By an Angel. In 2005 she filed for divorce from Eddie Van Halen, and a few years later she would be the star of yet another series, the TV Land sitcom Hot In Cleveland opposite Wendy Malick, Jane Leeves, and Betty White.

Trivia: Fresh from the Marquette University drama department, Charles Siebert continued his theatrical studies at the London Academy of Music and Dramatic Arts. Upon his graduation, Siebert and his wife had become so enchanted with England that he attempted to extend his visa by claiming that he'd gotten a job as a jazz-dancing teacher--a ruse that worked for a full year before he was found out. Following his professional debut in a Morristown, New Jersey production of Oedipus Rex, Siebert sought out work on Broadway, paying the rent by appearing in such TV daytime dramas as Search for Tomorrow and As the World Turns, and accepting roles in what Siebert would later describe as "The God Shows:" Sunday-morning religious anthologies like Lamp Unto My Feet, Look Up and Live and The Eternal Light. In the late 1960s, he bemusedly found himself the subject of media attention when he appeared in the play The Changing Room, which featured one of Broadway's first all-male nude scenes. Moving to Hollywood in 1976, Siebert quickly became a member in good standing of producer Norman Lear's talent pool, guesting on such series as All in the Family and Maude and appearing regularly as Mr. Davenport on One Day at a Time. While he has appeared in a number of films and had recurring roles on several weekly series, Charles Siebert is best known for his work as ivy-league doctor Stanley Riverside II on the TV medical drama Trapper John MD (1979-1986).