‘The
Marriage Ref” stumbled again Thursday night.

Jerry Seinfeld’s reality/comedy series averaged only 6 million viewers to finish last at 10 p.m. in both total viewers and adults 18-49 — despite A-list panelists Madonna, Larry David and Ricky Gervais.

“Ref” also shed almost 2 million viewers from its March 4 Thursday-night premiere.

CBS’ “The Mentalist” finished first at 10 with 16 million viewers.