Marcus Welby, M.D.

Dance to No Music (1x18)

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Joseph Campanella guest-stars as scientist Leo Maslow, who is convinced that he has an hereditary disease, Huntington's Chorea, which begins with complete loss of memory and inability to function. Welby and Kiley conduct tests, but are not convinced that Maslow has the disease. However, his condition continues to deteriorate, especially after he learns his wife is pregnant.