Steely Dan welcomed an old friend to the stage Monday night at New York's Beacon Theater -- Michael McDonald.
The singer-keyboardist, who toured as a member of the Dan in 1974 and sang on a few of their albums, joined Donald Fagen and company toward the end of their set for "My Old School" and "Peg," and returned for the encore of "Reeling in the Years" and "Pretzel Logic."