Acceptable Political Targets: People in the 1974–79 Labour government were often mocked for the economic troubles at the time, as were the major trade union leaders. Margaret Thatcher was sometimes included as well, though at the peak of Eric and Ernie's fame she was still only Leader of the Opposition. Harold Wilson generally got a free pass, as writer Eddie Braben had canvassed for him as a teenager in the 1940s.
The Grieg Piano Concerto sketch had not been fully rehearsed due to Andre Previn's schedule. He'd come straight to the recording from the airport and Eric and Ernie (especially Eric) were nervous about whether or not Previn would be able to put in a good performance. Then Previn walked on stage and demonstrated spot-on deadpan timing (Eric pumping his fist and yelling "He's got it!" was actual visible relief) and the sketch went on to become one of the most memorable moments in British comedy.
The number of big name celebrities that went onto the show (including Shirley Bassey and Judi Dench), all knowing that they would end up as the Butt-Monkey. Much of the humour comes from most of them not having been known for doing comedy.
Growing the Beard: Generally considered to be when Eddie Braben began writing for them.
Signature Song: "Bring Me Sunshine". Other songs they often performed as outros include "Two Of A Kind", "Positive Thinking" and "Following You Around".
Special Effects Failure: The initial joke in the "Singin' in the Rain" sketch is that Ernie is perfectly replicating the scene from the film...but there's no rain (the studio had too many exposed cables for them to accurately replicate the film's downpour), much to Eric's confusion in the background. Naturally, Eric manages to get soaking wet by completely unrelated means throughout the sketch.