The grand-daddy precursor to all 2000's shows to come that featured a kooky coroner: NCIS type shows (Paulie Perrette's goth character and the chubby blonde with a flower in her hair and colorful glasses): Starsky phones the coroner, and a woman who was doing karate to disco music while wearing thick glasses and a kimono, picks up and answers him.
Biorhythms was to (part of) the '70s what phrenology was to the early 19th century. Both pseudosciences that came and went, both gaining a lot of popularity at their incipience, later fading away, disproved as nothing more than a bogus fad. (Hutch was calculating Starsky's biorhythms in the intro.)