TELEVISION WORK

Backwards: The Riddle of Dyslexia (1984)

Kids Don't Tell (1985)

Morningstar/Eveningstar (1986)

Secret Witness (1986)
Two twelve-year-old boys play spies and investigate around their neighbourhood. But on one of their excursions they discover one of the boys' father with another woman...

GUEST APPEARANCES

Seven Brides For Seven Brothers (1982)
Drama series based on the famous musical of 1954, locating events on a modern-day California cattle ranch instead of Oregon mountains in 1850. Joaquin made a guest appearance as Travis, ostensibly because brother River was playing Guthrie McFadden (Gideon Pontipee in the original).
Episode: Christmas Song

Mr. Smith (1983)
Mr. Smith was a talking orangutan with an IQ of 256 that worked as a political advisor in Washington, D.C.

Hill Street Blues (1984)
Joaquin played Daniel Flowers.
Episode: The Rise and Fall of Paul the Wall

Murder, She Wrote (1984)
Joaquin and sister Summer played siblings in an episode.
Episode: We're Off to Kill the Wizard

The Fall Guy (1984)
Colt Seaver is a combination bounty hunter and stunt man. He drives a big Chevy truck with a eagle painted on its hood, chasing after "bad guys" and returning them to the LA area.
Episode: Terror U

Alfred Hitchcock Presents (1986)
A deaf rich boy (Joaquin) witnesses a murder, then blackmails the hit man into doing a job for him.
Episode: A Very Happy Ending

The Adventures of Superboy (1990)
The title probably gives the premise away.
Episode: Little Hercules