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Michael Des Barres
Michael Philip Des Barres (born 24 January 1948), the 26th Marquis Des Barres, is an English actor and rock singer. He appeared as Murdoc in the original MacGyver, Murdoc's mentor Nicholas Helman in MacGyver (2016) and replaced Robert Palmer in the band The Power Station, fronting the band at the 1985 Live Aid concert.
Source: Wikipedia