Sid Vicious was a punk rocker. In 1979, Julie Ledger had planned to hitchhike to London because she wanted to hang out with him but she was kidnapped by Demesne Furze. (AUDIO: Trail of the White Worm) The Tenth Doctor said he was going for a Sid Vicious vibe with his hair after Martha told him it looked like Sonic the Hedgehog. (PROSE: Forever Autumn) During a visit to 1976, the Seventh Doctor told Ace that she couldn't tell Sid Vicious to be more careful, adding that he wouldn't have listened anyway. (PROSE: Timewyrm: Revelation)