Laura Linney stars in the show as a reserved, suburban wife/mother/teacher whose terminal cancer diagnosis forces her to shake up her life.
Showtime said production will begin on 10 new episodes starting early next year for premiere in the second quarter of 2012.
The series co-stars Oliver Platt, Gabriel Basso and John Benjamin Hickey.
Exploding whale video goes viral on Internet
Gal Gadot cast as Wonder Woman for 'Batman vs. Superman'