Elliott Gould

Elliott Gould will go all vigilante for a guest spot on Law & Order, TVGuide.com has learned exclusively.

The veteran film star will play a disgruntled business owner who takes the law into his own hands after a crime spree in his Harlem neighborhood.

Gould, 71, received an Oscar nomination for 1969's swinging dramedy Bob & Carol & Ted & Alice and co-starred with Donald Sutherland in Robert Altman's film version of M*A*S*H.

More recently, Gould recurred as Ross and Monica's dad on Friends and co-starred with Brad Pitt and George Clooney in the Ocean's capers.

His episode is scheduled to air Nov. 20.