Made his performing debut at the age of 11 in a radio drama opposite his mother
Made his stage debut with a two-week stint in "The Corn Is Green"
Starred as a complex and misunderstood teenager in an episode of the CBS anthology series "Climax!"; the episode "Deal a Blow" was directed by John Frankenheimer
Reprised role for Frankenheimer's film version, which was renamed "The Young Stranger"
Left Harvard to appear in the Disney films, "Kidnapped" and "Swiss Family Robinson"
Made his Broadway debut, playing opposite Jane Fonda in "Invitation to a March"
Had a memorable role as a vicious killer on "The Untouchables" (ABC)
Cast as the eldest son of Henry Fonda's large brood in "Spencer's Mountain"
Had a brief but memorable appearance in the Clint Eastwood movie, "Hang 'Em High"
Played Danny 'Danno' Williams in the CBS series, "Hawaii Five-O"; left the series before the start of its twelfth and final season
Returned to the theater in "The Lunch Hour" with Cybill Shepherd
Played the lead role of Hildy Johnson in a production of "The Front Page," which was co-written by his father in the late 1920s
Starred in the made-for-television movie, "The Night the Bridge Fell Down"
Acted in the Family Channel movie, "Storm Chasers: Revenge of the Twisters"
Had a cameo role in Joe Moore's play "Dirty Laundry," playing a priest accused of molestation
Co-directed a revival version of "Twentieth Century," a play co-written by his father, Charles MacArthur and Ben Hecht