David Litvinoff
... that as a technical adviser on the 1970 film Performance, David Litvinoff introduced the cast and crew to London's underworld?
... that as a technical adviser on the 1970 film <i id="mwClk"><a href="./Performance_(film)" id="mwClo" rel="mw:WikiLink" title="Performance (film)">Performance</a></i>, <b id="mwCls"><a href="./David_Litvinoff" id="mwClw" rel="mw:WikiLink" title="David Litvinoff">David Litvinoff</a></b> introduced the cast and crew to London's underworld?