First season of ` ` The Patty Duke Show '' out on DVD . In it , Duke played identical cousins Patty and Cathy Duke . She remembers home as haven during tough times as teenager . Actress later was diagnosed as bipolar ; she now helps people who have problems .
First season of `` The Patty Duke Show '' out on DVD . In program , Duke played identical cousins Patty and Cathy Lane . Duke remembers show as haven during tough times as teenager . Actress later was diagnosed as bipolar ; she now helps people who have disease .