This Week On The Shows: Oct. 4-8

• Monday
  
  
  • Leno: Will Arnett

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• Tuesday
  
  
  
  • Ferguson: Cory Kahaney

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• Wednesday
  
  • Fallon: Peter Sagal & Carl Kasell

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• Thursday
  
  
  
  • Letterman: Stephen Colbert (1st guest)
  • Ferguson: Louie Anderson

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• Friday
  
  
  
  • Letterman: Allan Havey
  • Ferguson: Mary Lynn Rajskub (1st guest)
  • Kimmel: Dane Cook
  • Fallon: Nick Swardson

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All guests as listed on shows' web sites at time of posting. Changes in schedule may be reflected in updates.