Mark Pellegrino portrays Jacob in "The Incident, Part 1".
- The day after "The Incident, Part 1" aired, appeared on CSI: Crime Scene Investigation alongside Lost co-stars Cynthia Watros and Marc Vann.
- Appeared in the 2006 film "Caffeine" alongside Lost co-stars Marsha Thomason and Sonya Walger.
- Appeared in the series "Prison Break" as Vicon (2008)
- Appeared in the 2001 film "Mulholland Dr." alongside Lost co-star Patrick Fischler
- Appeared in the 2001 tv series "The Beast" alongside Lost co-stars Elizabeth Mitchell and Naveen Andrews
- Appeared in the 1996 film "The Big Lebowski"