- When Kate attempts to break Pete's birthday curse and help him have a fun birthday, the curse proves to be more powerful than she anticipates.
- Meanwhile, Diane and Jackie shop together for Pete's birthday gift and the kids are at home with lobsters that refuse to be a main course.
"Trophy Wife" stars Malin Akerman as Kate, Bradley Whitford as Pete, Michaela Watkins as Jackie, Natalie Morales as Meg, Ryan Lee as Warren, Bailee Madison as Hillary, Albert Tsai as Bert and Marcia Gay Harden as Diane.
Guest cast in "The Big 5-O" includes Betsey Halpern as Woman, Daniel Montgomery as Delivery Guy, Laraine Newman as Juniper, Annie Ruby as Heaven, Carol Avery as Carly, Dean Cudworth as Cop, ElTony Williams as Ron, Claudia Choi as Oksana, Kimmy Gatewood as Ingrid, Matt Oberg as DMV Clerk, Patrick Rafferty as Driving Proctor and Ken Narasaki as DMV Guy.
"The Big 5-O" was written by Vijal Patel and directed by Christine Gernon.