Late Show with David Letterman - Season 15 Episode 158 Richard Simmons, Mary-Louise Parker
Paul Thoresen appears again to drop a 55-gallon water balloon on a '94 Chevy LeBaron convertible; Dave and Richard Simmons have another animated interview, in which the fitness guru stands and sings on the guest chair; Richard also appears on another tension-filled edition of "Alan Kalter's Celebrity Interview"; in her first Late Show appearance in 13 1/2 years, Mary-Louise Parker plugs "Weeds" while Dave
- Genre: Talk, Comedy
- Studio: CBS
- Keyword: late-night show
- Cast: David Letterman, Paul Shaffer, Alan Kalter
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