The picture is a parody of British rock band "The Who" album cover.

fsnfanboy said:

The picture is a parody of British rock band "The Who" album cover.

Also might be a nod the the cast being in London for London Expo this weekend

Based on this, a picture that was used as the album cover of The Who Sings My Generation released Decca Records in the USA in 1966 (first released by Brunswick Records in the U.K. in 1965 with a different cover). Both cover photographs by David Wedgebury.

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