Professional acting debut, cast as the understudy to the lead in a Chicago production of "Status Quo Vadis"; assumed role when original actor quit

Broadway debut in "Status Quo Vadis" (lasted one performance)

Moved to L.A.

Began acting career with walk-on parts in "Hawaii Five-O" and "Police Woman" and with five lines on a "Mary Tyler Moore Show" episode

Feature film debut in "Six Pack Annie"

First major TV-movie role as James Arness's nephew in "The Macahans" (ABC)

Starred as regular in first TV series, "How the West Was Won" (ABC)

Co-starred in the NBC miniseries "The Last Convertible"

Made first appearance as Billy Montana in "The Gambler" (CBS); reprised role in three of the four sequels

Played Charles Trask in the ABC miniseries "John Steinbeck's East of Eden"

Starred with Jeff Bridges in the Disney film "Tron"

Played Frank Buck in the CBS action series, "Bring 'Em Back Alive"

Co-starred opposite Kate Jackson in the romantic spy series "Scarecrow and Mrs. King" (CBS)

Starred with James Arness in the CBS remake of "Red River"

Hosted the Disney Channel series "Backstage at the Zoo"

Executive produced and starred in the Showtime TV movie "Double Jeopardy"

First starred opposite Melissa Gilbert in NBC's "House of Secrets", a loose remake of "Diabolique"

Joined the cast of the TV science-fiction series, "Babylon 5", in its second season in the role of John Sheridan; show moved to TNT for its final season in 1997-1998

Co-starred with Melissa Gilbert in "Danielle Steele's Zoya" (NBC)