 When Austin St. John (qv) (Jason), Walter Jones (I) (qv) (Zack)  and Thuy Trang (qv) (Trini) were no longer filming episodes of the  series, additional dialog for their characters voices were done by  uncredited actors. For the new episodes, Trinis voice was done by  an unknown actress named Judy, Jasons was done by associate  producer Paul Rosenthal and Zacks was done by Joel Rogers, Bob  Manahans second engineer.