From the Wikipedia page:

Your Show of Shows is a live 90-minute variety show that was broadcast weekly in the United States on NBC from February 25, 1950, through June 5, 1954, featuring Sid Caesar and Imogene Coca. Other featured performers were Carl Reiner, Howard Morris, Bill Hayes, baritone Jack Russell (singer), Judy Johnson, The Hamilton Trio and the soprano Marguerite Piazza. José Ferrer made several guest appearances on the series.

In 2002, Your Show of Shows was ranked #30 on TV Guide's 50 Greatest TV Shows of All Time.[1] In 2013, it was ranked #37 on TV Guide's 60 Best Series of All Time.[2]

In 2013, Your Show of Shows was ranked #10 on Entertainment Weekly’s Top 100 Greatest TV Shows of All Time.