PERRY MASON RETURNS - After a long and successful career as a lawyer, Perry Mason (Raymond Burr) has put down his briefcase and has picked up the gavel. However, he decides to resign his judgeship and return to the other side of the courtroom when his former longtime secretary, Della Street (Barbara Hale), is accused of murdering the wealthy businessman she was working for. Using his still sharp investigative skills and the help of Paul Drake, Jr.. (William Katt), the son of his former private investigator, Perry attempts to bring the true culprit to justice. In THE CASE OF THE NOTORIOUS NUN PERRY, Mason (Raymond Burr) once again finds himself on the defense when a nun is accused of murdering a priest with whom she was rumored to be having an affair. Danger is around every corner for Paul Drake, Jr.. (William Katt) when he comes to Perry's assistance in the case to determine if the sister was wrongly implicated, or if she truly is less saintly than she seems.