 Marquez appeared in a 1992 episode of "Seinfeld" called "The Cheever Letters", portraying a secretary in the Cuban Permanent Mission (the US and Cuba did not have mutual embassies from 1961 to 2015).Her success with "Stand and Deliver" led to a full-fledged career in film and television, with roles in the gangster epic "Blood In Blood Out" (1993) and the independent film "Twenty Bucks" (1993).Her television work included guest spots on popular programs, including "Melrose Place" (1992) and recurring roles on "ER" (1994-1997) and "Malcolm & Eddie" (1996).