Jon Hamm (Irwin Maurice 'Fletch' Fletcher), Roy Wood Jr. (Inspector Morris Monroe), Ayden Mayeri (Junior Detective Griz), Lorenza Izzo (Angela de Grassi), Kyle MacLachlan (Ronald Horan), John Slattery (Frank Jaffe), Travis Bennett (Breez), Robert Picardo (Graf Clementi Arbogastes de Grassi), Marcia Gay Harden (Gräfin Sylvia de Grassi), Kenneth Kimmins (Der Commodore), Eugene Mirman (Marv, Sicherheitsbeauftragter des Yachtclubs), Annie Mumolo (Eve), John Behlmann (Owen Tasserly), Lucy Punch (Tatiana Tasserly), Owen Burke (Detective), Bates Wilder (Detective), Erica McDermott (Detective), Domenico Del Giacco (Italienischer Detective), Marina Re (Italienische Haushälterin), Anna Osceola (Larry), Caitlin Zerra Rose (Laurel Goodwin)