- Greg Itzin Fan Site
 - Dedicated to character actor Gregory Itzin. Features film and theatrical credits, photos, and more. - IMDb: Gregory Itzin
- Biography, photos, and list of television and film credits for actor Gregory Itzin, best known for his role on 24.
- Rotten Tomatoes: Gregory Itzin
- Offers links to reviews of actor Gregory Itzin's films.
- TV.com: Gregory Itzin
- Biography, photos, and list of television appearances by actor Gregory Itzin.
- Wikipedia: Gregory Itzin
- User-created biography for Tony Award-nominated actor Gregory Itzin, known for his appearances on such TV series such as Friends, Navy NCIS, Judging Amy, Boston Legal, CSI: Crime Scene Investigation, and for his role as President Charles Logan on 24.
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