Return to Forever IV — a reunion group featuring several principal members of the pioneering jazz rock fusion band — will perform at the Mondavi Center at 8 p.m. Wednesday, Sept. 21. The lineup includes, from left, violinist Jean-Luc Ponty, drummer Lenny White, keyboard player and founder Chick Corea, bassist Stanley Clarke and guitarist Frank Gambale. Return to Forever released a string of innovative albums in the 1970s, and has reunited on occasion in succeeding decades. Opening the show will be Zappa Plays Zappa, a Grammy-winning band led by Dweezil Zappa that specializes in the unique music of Dweezil’s iconoclastic father Frank Zappa (1940-1993). Tickets are $55-$95 general, $27.50-$47.50 students, available at www.mondaviarts.org or (530) 754-2787.