The sketch comedy series At Last the 1948 Show was the first big break for rising young British comedians and friends Marty Feldman (Igor in Young Frankenstein), Tim Brooke-Taylor, and future Monty Python's Flying Circus writer/performers John Cleese and Graham Chapman. Prior to the show, they had worked at local comedy clubs and had written and acted in The Frost Report. The show was executive produced by David Frost and aired on the ITV network for two runs of six and then seven episodes in 1967. Described by Brooke-Taylor as a combination of the cutting edge satirical stage revue Beyond the Fringe and British music hall, the show's sketches work within conventional structures and strive for a high degree of professionalism in both writing and performance. The most popular and well-known sketch is "The Four Yorkshiremen," later adapted by Monty Python, where a group of middle-aged businessmen brag about their ridiculously awful childhoods. The sketches are connected by short bits starring Aimi Macdonald, who plays a carelessly vain and occasionally cruel showgirl. Eric Idle made several appearances in bit parts. The Python troupe would essentially be formed from the creative minds behind At Last the 1948 Show and a popular children's sketch comedy series from the same period, Do Not Adjust Your Set.