- In the sailor chorus of the original Broadway version of "South Pacific", he met future singing wife, Jeannie Carson, when both were cast in "Finian's Rainbow" in 1960. They married that same year and toured in 1961 in "Camelot" with Biff as "Arthur" and Jeannie as "Guinevere". The couple performed together for much of their career, including a 15-year stint with the Seattle Repertory Theatre.
- At one time did story lines for TV's Mister Peepers (1952) with Wally Cox, and has written a couple of plays on the sly.
- Was twice nominated for Broadway's Tony Award as Best Actor (Featured Role - Play): in 1997 for "The Young Man from Atlanta," and in 2002 for a revival of "Morning's at Seven."
- Made guest appearances on two of the longest-running prime time dramas in US television history: Gunsmoke (1955) and Law & Order (1990).
- Nickname of "Biff" evolved while playing football in his early years.
- Became interested in acting during WWII service while stationed in England. Made his debut in the first production of William Saroyan's "The Time of Your Life", directed by Peter Glenville.
- August 2004: Onstage in an off-Broadway production of Horton Foote's "The Day Emily Married".
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