Investigation Held by ZnaToKi 1971
Season 1
1971
23 episodes
Season 1 of Investigation Held by ZnaToKi premiered on February 14, 1971.
Season 2
2002
4 episodes
Season 2 of Investigation Held by ZnaToKi premiered on January 26, 2002.
Season 3
2003
6 episodes
Season 3 of Investigation Held by ZnaToKi premiered on January 1, 2003.