Actor:
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1. Iadul este pentru eroi (1962), film...Pvt. Driscoll
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2. The Tonight Show Starring Johnny Carson (1962), seriale...Self - Guest Host
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3. Fractured Flickers (1963), seriale...Self
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4. Milioane fierbinti (1968), film...Willard C. Gnatpole
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5. Capcana-22 (1970), film...Major Major
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7. The Bob Newhart Show (1972), seriale...Dr. Robert 'Bob' Hartley
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8. Mica domnişoară Gaj (1980), film...Regret
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9. Newhart (1982), seriale...Dick Loudon
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10. Bob (1992), seriale...Bob McKay
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11. Svengoolie (1995), seriale...Dr. Robert 'Bob' Hartley
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12. Este sau nu este? (1997), film...Tom Halliwell
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13. Blonda de la Drept 2 (2003), film...Sid Post
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14. Elful (2003), film...Papa Elf
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...Judson
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16. Comoara din spatele cărților 2 (2006), film...Judson
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17. Teoria Big Bang (2007), seriale...Arthur Jeffries
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...Judson
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19. Șefi de coșmar (2011), film...Lou Sherman
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20. Cinci (2011), film...Dr. Roth
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21. Bibliotecarii (2014), seriale...Judson
Vocea:
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1. Micii salvatori (1977), film...Bernard
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2. The Rescuers Down Under (1990), film...Bernard
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...Leonard the Polar Bear