*Rosie Perez will check in to All Saint’s hospital for one episode of Showtime’s “Nurse Jackie” when it returns for its fourth season next year.

The Oscar and Emmy nominated actress will star as Jules, a patient with an unusual diagnosis.

Production has already begun on Season 4 of the series, which stars Emmy winner Edie Falco as a drug-addicted nurse.

Season 3 ended with Anna Deavere Smith’s Gloria Akalitus – the now former top dog at All Saint’s – essentially holding Jackie’s fate in her hands before disposing of a urine sample that more than likely could have spelled doom for the pill-popping nurse.

Season 4 will begin in 2012.