He is best known for originating the roles of Judge Turpin in Sweeney Todd: The Demon Barber of Fleet Street and Cinderella’s Father in Into the Woods.
His other Broadway credits include 1776, Mrs. Warren's Profession, A Doll's Life, and Merlin, and he also played Sir Danvers Carew in the 1990 world premiere of Jekyll & Hyde.
Lyndeck, a former college professor, spent over a dozen years in stock and regional theater before making his Broadway debut in the original production of 1776.
He followed up Sweeney Todd with another Stephen Sondheim musical, Into the Woods, originating the role of Cinderella's Father and later playing the Mysterious Man as well.
He was a contract player on a now-defunct soap opera, The Doctors, and has had guest roles in series like Ed, The Cosby Show, and Law & Order: Special Victims Unit.