1. Scott (born in 1956) was the serious actor, specializing in weird, quirky movies, such as Bad Ronald (1974), in which a boy hides in the crawlspaces of his house after his mother dies and terrorizes the new family that moves in (including the hunky Ted Eccles), or The Little Girl Who Lives Down the Lane (1976), in which a handicapped boy befriends a girl (Jodie Foster) who lives all by herself after her father's death.
He played a teenager who discovers that his father is gay in That Certain Summer (1973). Hal Holbrook played his father, and Martin Sheen his father's lover.
His characters were always heterosexual, but the "quirky romance" still had queer resonances that appealed to gay teens.
Scott still acts occasionally, and he owns a recording studio in Hollywood.
2. Billy born in 1969, was the hunk. After a few horror films, he played girl-crazy teenagers who don't seem to own shirts in Just One of the Guys (1985) and Party Camp (1987). His characters were heterosexual, too, but -- odd for 1980s teen movies -- not homophobic.
He also played Blanche's grandson on The Golden Girls.
Billy was probably best known for his role as wannabe thug Mikey, who wore a leather jacket and skin-tight jeans on the tv series Parker Lewis Can't Lose (1990-1993).
Today, as Billy Jayne, he is well-known in the business as a commercial director.
3. The baby of the family, Bobby (born in 1973), was the wise-guy. He started out in tear-jerker movies of the week, then moved into thrillers like Tremors (1990) and Night of the Demons 2 (1994). He was also busy in television, starring on Knots Landing (1980-85) and, as a young adult, on MTV's Undressed (2000-2001). Not a lot of beefcake shots, except on Undressed, which apparently existed solely to film attractive young people in their underwear.