"[2] The central characters are a ninja group who serve as secret police agents in Edo.
They work undercover under the direction of a hatamoto, and later, under Matsudaira Sadanobu.
[2] A 1979 film Onmitsu Dōshin Ōedo Sōsamō starred Hiroki Matsukata, included Toshiro Mifune in the role of Matsudaira Sadanobu.
The special episode Onmitsu Doshin: Oedo Sosamo was made in 1979, guest-starring Toshirō Mifune in a rare TV role.
[4] Jidaigeki Senmon Channel has rerun all the other 715 episodes via satellite and cable.