After the London-based blues band Fleetwood Mac emigrated to California, they added singer/songwriter / guitarist Bob Welch. Drummer Mick Fleetwood, bass guitarist John McVie , and Mac’s singing/ songwriting/ keyboard playing wife Christine not only had their  passports stamped, Welch provided a highly significant bridge melodically and stylistically between Fleetwood Mac’s uncompromising blues repertoire of original guitarist Peter Green and the next era a year later, when two unknown Californians would replace Welch with phenomenal results. But legendary progressive rock station KSAN-FM in San Francisco and format godfather Tom Donahue set up a live-in-the-studio broadcast from Bay Area studio The Record Plant in Sausalito, with the late Bob Welch singing the sublime “Hypnotized”. –Redbeard

(From left John McVie, Mick Fleetwood, Bob Welch, Christin McVie )