David Appelbaum is a writer on the T.V. show The Mentalist since its second season. He has been a co-producer for the show as of Season 6. He left the series before the beginning of Season 7 to join NCIS: New Orleans as a writer/producer.
- Red Herring (2.15)
- Blood for Blood (3.14)
- Rhapsody in Red (3.22)
- Where in the World is Carmine O'Brien? (4.06)
- At First Blush (4.14)
- Cherry Picked (5.06)
- There Will Be Blood (5.16) with Ken Woodruff
- Grey Water (6.14)
- Black Hearts (6.21) with Ken Woodruff
David Appelbaum has written a total of 9 episodes over five seasons.