Mindhole Blowers: 10 Television Characters You May Not Have Realized Had Been Recast

Marta, Arrested Development —Patricia Velasquez, Leonor Varela, and Uncredited Actress.

Ann, Arrested Development — Alessandra Torresani and Mae Whitman

Frank Costanza, Seinfeld — John Randolph and Jerry Stiller

Lloyd Braun, Seinfeld — Peter Keleghan and Matt McCoy

Trey Atwood, The O.C. — Bradley Stryker and Logan Marshall Greene

Sylar, Heroes — Stunt Doubles in Shadows and then Zachary Quinto

Helene Beesly, The Office — Shannon Cochran and Linda Purl

Gregor Clegane, Game of Thrones, Conan Stevens and Ian Whyte

Gordon, Sesame Street — Matt Robinson, Hal Miller, and of course Roscoe Orman

Backup, Veronica Mars — Gordo and Lefty