Klugman was active in numerous stage, television, and film productions during the 1950s and '60s.

In 1950, he had a small role in the Mr. Roberts road company at the Colonial Theatre in Boston.
Later that same year, he made his television debut in an episode of Actors Studio.
In March 1952, Klugman made his Broadway debut in Golden Boy, as Frank Bonaparte.

In 1954, he played Jim Hanson on the soap opera, The Greatest Gift.
The following year, he appeared in the live television broadcast of Producers' Showcase, in the episode "The Petrified Forest" with Humphrey Bogart and Henry Fonda.
Klugman later said the experience was the greatest thrill of his career.
He went on to appear in several classic films, including 12 Angry Men (1957), as juror number five.
In 1959, he returned to Broadway in the original production of Gypsy: A Musical Fable.
In 1960, Klugman was nominated for a Tony Award for Best Featured Actor (Musical) for his role in the show, but lost to Tom Bosley in Fiorello!.
He remained with Gypsy until it closed in March 1961.

From 1960 to 1963, Klugman appeared in four episodes of The Twilight Zone series: "A Passage for Trumpet" (1960), "A Game of Pool" (1961), "Death Ship" (1963), and "In Praise of Pip" (1963), tying with Burgess Meredith for the most appearances in a starring role on the series.
In 1964, he won his first Primetime Emmy Award for his guest starring role on The Defenders.
That same year, Klugman landed the starring role in the sitcom Harris Against the World.
The series was a part of an experimental block of sitcoms that aired on NBC entitled 90 Bristol Court.
Harris Against the World, along with the other sitcoms that aired in the block, were canceled due to low ratings the following year.

Klugman continued the decade with multiple guest roles on television including The F.B.I., Ben Casey, The Name of the Game, and Insight.
He also appeared on Broadway in Tchin-Tchin, from October 1962 to May 1963.
 From 1960 to 1963, Klugman appeared in two episodes of The Untouchables series: "Loophole" (1961), and "An Eye for an Eye" (1963).
Klugman was active in numerous stage, television, and film productions during the 1950s and '60s.
In 1950, he had a small role in the Mr. Roberts road company at the Colonial Theatre in Boston. Later that same year, he made his television debut in an episode of Actors Studio. In March 1952, Klugman made his Broadway debut in Golden Boy, as Frank Bonaparte.
In 1954, he played Jim Hanson on the soap opera, The Greatest Gift. The following year, he appeared in the live television broadcast of Producers' Showcase, in the episode "The Petrified Forest" with Humphrey Bogart and Henry Fonda. Klugman later said the experience was the greatest thrill of his career. He went on to appear in several classic films, including 12 Angry Men (1957), as juror number five. In 1959, he returned to Broadway in the original production of Gypsy: A Musical Fable. In 1960, Klugman was nominated for a Tony Award for Best Featured Actor (Musical) for his role in the show, but lost to Tom Bosley in Fiorello!. He remained with Gypsy until it closed in March 1961.
From 1960 to 1963, Klugman appeared in four episodes of The Twilight Zone series: "A Passage for Trumpet" (1960), "A Game of Pool" (1961), "Death Ship" (1963), and "In Praise of Pip" (1963), tying with Burgess Meredith for the most appearances in a starring role on the series. In 1964, he won his first Primetime Emmy Award for his guest starring role on The Defenders. That same year, Klugman landed the starring role in the sitcom Harris Against the World. The series was a part of an experimental block of sitcoms that aired on NBC entitled 90 Bristol Court. Harris Against the World, along with the other sitcoms that aired in the block, were canceled due to low ratings the following year.
Klugman continued the decade with multiple guest roles on television including The F.B.I., Ben Casey, The Name of the Game, and Insight. He also appeared on Broadway in Tchin-Tchin, from October 1962 to May 1963.  From 1960 to 1963, Klugman appeared in two episodes of The Untouchables series: "Loophole" (1961), and "An Eye for an Eye" (1963).
Jack Klugman