A few I love:

The Constant: A History of Getting Things Wrong. Host Mark Chrysler tells stores from the distant to not-to-distant past of people being wrong. Wrong science, crockpot ideas, and more. For example, one episode looks at where people thought birds went in the winter, such as flying to the moor or turning into barnacles. There are 2 different episodes on different doctors that thought sewing animal testicles (one ape balls, the other goat balls) bought great health benefits. Another series of episodes looks at how most forensic techniques (at least before DNA) ante based on pure BS.

Our Fake History: Host Sebastian Major tells the truth about historic myths, be it about people, organizations, or places. Did Shakespeare write his plays? Was the story of the Trojan War based on real history? Was their really a black samurai?