The Interior Motive

From The Arthur Conan Doyle Encyclopedia
The Universe & I presents
The Interior Motive (1975)

The Universe & I presents was an educational series produced by Kentucky Educational Television (KET) targeting middle school grades. Funded by The Corporation for Public Broadcasting (CPB) the Kentucky Network showed these series on a closed circuit TV in Kentucky public schools. They were filmed in Kentucky.

The Interior Motive is the 13th episode of this series. Filmed in 1975, and updated in 1987, starring Leonard Nimoy as Sherlock Holmes and Burt Blackwell as Dr. Watson. 20 min.

A clip of this movie was used in an episode of Sesame Street, with a puppet wearing Sherlock Holmes outfit (MacFarlane and deerstalker).




  • Director/Producer : George Rasmussen
  • Writers : Richard Smith, David Benjamin, Stephen Jordan, Willard Whitson, Greg Wombel, Guy Mendes, Marsha Cooper Hellard, Tim Tassie, George Rasmussen
  • Associate Producers : Marsha Cooper Hellard, Dorothy Peterson
  • Unit Managers : Tim Kaiser, Tomasina Morris
  • Videographer : Robert K. Simmons
  • Cinematographers : BillMartin, Art Kibby, Martha Chute
  • Assistant Cinematographer : David Ray Robinson
  • Editors : Dick Raynor, Tony Minton
  • Video Engineer : Butch Houghton
  • Lighting : Mike Heaton, Edward Shuman, Steve Peckham
  • Audio : Jim Slone, Gary Mosley, Roger Tremaine, Mike Puckett
  • Animation : Martha Chute, Terry Schoen, Damon Farmer, Rob Baggett, Samuel Comstock, Stanley Majka
  • Title Design : Martha Chute
  • Graphics : Carolyn McCafferty, Ethel Warren, Tamara Webb
  • Crew Chief : Joy Flynn
  • Videotape Editing Engineer : Jamie Urquhart
  • Original Music : Bill Mumy, Gerry Beckley, Andy Raut, Phil Amalong, David Ott, Robert Lafontaine
  • Set Design : Fred Rivers, Missy Holloway, Bob Thomas
  • Carpenter : Leon Tracy
  • Costumer/Makeup : Jo Motsinger, Jeanette Motsinger, Martha Bassiri
  • Production Assistants : Charlee Heaton, Bill Preston, John Gorman, Bill Rezny, Keith Morgan, Calvin Smith, Jim Douglas, Tom Fitzpatrick, Mike Howard, Bruce Waters, Jody Hein, Mike Clark, Joel Embry, David Haydon, Marta Ferguson, Jim Versaw, James Walker, John Holloway, Lynn Cooper, Steve Mitchell, Otis Ballard, Duncan Hart, Johnny Anderson, Kirk Lehtomaa, Bob Hutchinson, Dennis Busher, Ron Downey, Russ Farmer, Alan Owens, Vince Spoelker, Mark Witzer
  • Researcher : Laura Stone
  • Production Secretary : Carolyn Gwinn
  • Still Photographers : Chela Kaplan, David Crawford, Charles Haynes, Joel Seidelman
  • Post Production Facilities : Consolidated Film Industry, Glen Glenn Sound, Instant Replay, Kentucky Production Center, Producers Services
  • Film Transfer : Hank Batts, Mike Jarrell
  • Student Supplements : Mike Howard
  • Production Finances : Stella Harris, Patricia Sleet
  • For the CPB : Doug Bodwell, Meg Villareal
  • Project Directors : Tim Tassie, George Rasmussen
  • Executive Producer : Sandra H. Welch

Plot summary

Holmes finds a globe in front of their door, accompanied by a cryptic note. Watson urges Holmes to solve the riddle before the Royal Society will be at his home in the evening. Their first findings tell them that the inside material must be heavier than the outside material. Therefore, Sherlock Holmes states that the globe is not made of the same materials throughout and he must use inferences to solve the riddle. Holmes checks the temperature inside through a little hole. Next, Holmes listens to the globe with a stethoscope and hears slight rumblings. Now Holmes sets up a series of mirrors and lights and tries vibrations which he divides into primary and secondary vibrations. The primary vibrations going through gasses, liquid, air and solids, the secondary through solids only. For his nephew's birthday Watson has bought a compass. As he unpacks it, he wonders why it is not showing north but to the globe. Holmes finds the missing piece to the riddle and promises Watson the answer tonight when the Royal Society will be in. In front of them Holmes explains how he came to the solution: the difference in the waves of vibration gave him a clue where the core is located and its dimensions. The temperature and the magnetic field indicate what a the core is about... Hot melted metal. As they applaud, Holmes refuses the praise at first because the real answer is that he used the same methods he would use in solving a crime. So therefore, a detective is a scientist and the scientist is a detective.