Robert Duvall in The Seven-Per-Cent Solution (1976)
“…Watson, in a desperate effort to save Holmes’s life, must somehow get Holmes to Vienna for treatment by a new young doctor named Sigmund Freud, and that Holmes and Freud, two of the greatest minds of their time, join forces to solve a diabolical plot involving a beautiful, red-haired musical comedy star, an arrogant, dishonorable German baron, an amorous Turkish pasha and a great train chase through Austria to the very borders of the Ottoman Empire.
…the particular revelation of “The Seven-Per-Cent Solution” is Robert Duvall, one of America’s best actors, who plays the English Dr. Watson with such wit and control that it’s difficult to believe he’s ever played an American with equal conviction. It’s a very funny performance, and very important to the overall shape and cohesion of the film.” (x)
Also, there are attack horses.