Marcus Welby, M.D. - Season 1 - Eps 20: Nobody Wants a Fat Jockey
Dinty Gallagher refuses to give up his regimen of diet pills and steam baths, even after having fainting spells. Gallagher's desperate attempts to make the weight for the most important race of his life result in physical collapse and he is hospitalized. There he overhears Doctors Welby and Kiley tell his manager that tests indicate he is still growing, at 21, and that it will be impossible for him to continue his career as a jockey.
About Marcus Welby, M.D.

Title: Marcus Welby, M.D.
First Air Date: 1969-09-23
Last Air Date: 1976-05-04
Status: Ended
Rating: 6.5/10 (from 19 votes)
Language: EN
Seasons: 8
Total Episodes: 171
Network: ABC
Genres: Drama
Production Companies: Unknown
Synopsis
Marcus Welby, M.D. is an American medical drama television program that aired on ABC from September 23, 1969, to July 29, 1976. It starred Robert Young as a family practitioner with a kind bedside manner and James Brolin as the younger doctor he often worked with, and was produced by David Victor and David J. O'Connell. The pilot, A Matter of Humanities, had aired as an ABC Movie of the Week on March 26, 1969.
Cast

Robert Young
Dr. Marcus Welby

James Brolin
Dr. Steven Kiley

Pamela Hensley
Janet Blake

Sharon Gless
Kathleen Faverty

Elena Verdugo
Consuelo Lopez