Starsky & Hutch (1975)

S1E21 A Coffin for Starsky

Fueled by a desire for vengeance against Hutch, a deranged chemist accidentally administers a deadly poison to Starsky, giving him just 24 hours to locate the antidote before it claims his life. The situation escalates when Starsky ends up killing the sole prime suspect who could have revealed crucial information about the poison.