Hippies were members of a youth movement in the late 1960s and early 1970s.

In 1967, Blue Moonbeams were distributed to the hippies in San Francisco. (PROSE: Wonderland)

Edmund Trevithick's granddaughter joined a hippie commune after her parents died in a car crash in Crook Marsham in 1967. (PROSE: Nightshade)

At the end of a brief visit to London in 1967, Ace was disappointed that she had not seen a single hippie. (AUDIO: Thin Ice)

In 1969, a group of hippies set up a commune on L'Ithe, but left a week later, claiming the island was haunted. (PROSE: The Scales of Injustice)

Hippie culture was revived by the founders of the Psychic Circus. (TV: The Greatest Show in the Galaxy)

River Song labelled the Eleventh Doctor as a hippie due to his criticism of Richard Nixon's presidency. (TV: The Impossible Astronaut)

The Master once referred to the Prydonian Chapter as "hippies." (AUDIO: The Toy)

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