Extensions is the fifth studio album by The Manhattan Transfer, released on October 31, 1979, by Atlantic Records. Marking a new era for the group, the album was the first one with Cheryl Bentyne, who replaced Laurel Massé in early 1979. It was also their first album with Jay Graydon in the producer's chair and their first to contain songs that were hits in both the jazz and pop categories. The song "Twilight Zone/Twilight Tone" reached No. 4 on the Billboard Disco chart and No. 30 on the Hot 100. "Trickle, Trickle" reached No. 73 on the Hot 100. The album reached No. 55 on the Billboard Top LPs chart.