This week on The Treatment, Elvis welcomes back actress Molly Shannon, who is currently starring in the Showtime series “I Love That for You” and has written a memoir “Hello, Molly!” Shannon, a “Saturday Night Live” alum, has also recently appeared in the HBO series “The White Lotus” and “The Other Two.” Shannon, who lost her mother and sister in a car accident as a young girl, tells The Treatment she began her memoir with the accident because it deeply impacted the direction of her life. She talks about the genesis of her SNL Catholic school girl character Mary Katherine Gallagher. And she says her father was her biggest cheerleader and her first acting teacher.