Mandell's connection to the works of Irish playwright Samuel Beckett was legendary, forming a cornerstone of his extensive career. His journey with Beckett's absurdist theatre began in a truly unique setting: portraying the slave Lucky in a 1957 performance of Waiting for Godot for 1,400 inmates at San Quentin. This pivotal event not only introduced the play to a captive audience but also led Mandell to co-found the San Quentin Drama Workshop with inmate Rick Cluchey, guiding numerous prison productions over the years.

His mastery of Beckett's text eventually led to a direct collaboration with the playwright himself, who directed Mandell in Waiting for Godot and Endgame (as Nagg) in Europe. This relationship endured until Beckett's death in 1989. Mandell once remarked on Beckett's precision, stating, "The text for [Beckett] was like a score, and the important thing for us was to find the rhythm of the line. Once you had that, you were set."

Mandell's profound understanding of Beckett made him a sought-after authority. Even last year, actors Keanu Reeves and Alex Winter consulted with Mandell at his home while preparing for their Broadway revival of Waiting for Godot. Daniel Segura, Mandell’s assistant for a decade, praised his unique talent: "As an actor, he just had a lyricism to him that was poetic. Hearing him do Beckett, I was always blown away by his musicality. He could deliver it to an audience that all of a sudden got it."

Beyond the stage, Mandell made memorable appearances in film and television, delighting audiences with his distinctive presence. Film fans will recognize him as the aging rabbi who dispenses Jefferson Airplane lyrics as counsel in the Coen brothers' A Serious Man (2009). He also collaborated with director John Cameron Mitchell in Hedwig and the Angry Inch (2001) and Shortbus (2006). On the small screen, his credits included popular shows like Cannon, The Six Million Dollar Man, Baretta, Eight Is Enough, Sisters, and Grey’s Anatomy.

Born Albert Mandell in Toronto on December 27, 1927, his passion for the stage ignited early. Recalling his decision to pursue acting, Mandell once shared his father's humorous skepticism: "My father wanted to know what was going to happen to me. I was 17 or 18. I told him I was going to go into the theater. He looked at me and said, ‘A nice Jewish boy goes to the theater.’ It was a great remark. I didn’t know what to say."

Mandell's career saw him serve as artistic director of Toronto's Theater '49 before moving to San Francisco, where he joined and later managed the influential San Francisco Actor’s Workshop. He went on to manage the Repertory Theatre at Lincoln Center in New York and continued his work in Los Angeles, earning Ovation Awards for his performances in plays like Joanna Glass's Trying and Harold Pinter's No Man’s Land. His final Beckett performance was in Endgame in 2016.

Mandell's legacy extends through his children, grandchildren, and his brother. His passing marks the end of an era for theatre, film, and television, leaving behind a profound body of work and an unforgettable connection to some of the most challenging and rewarding roles in modern drama.