The scenes shot on the M.G.M. back-lot, viewed in Hannaford's film-within-a-film, were photographed without M.G.M.'s permission. Welles was smuggled onto the back-lot in a darkened van, while the rest of the cast and crew pretended to be a group of film students visiting the studio. The crew was not confident that they would ever be able to access the back-lot again, and so filmed everything over one long, amphetamine-fuelled week-end in 1970, without sleep. The back-lot, which was seriously dilapidated, was demolished shortly afterwards, and only one more film – "That's Entertainment!" (1974) – was shot there before its demolition.