Investigation Held by ZnaToKi (Season 1)

Episode 1 (Episode 1) 8.7

Air date: 1971-02-14

Runtime: 55 min

Episode 2 (Episode 2) 9.0

Air date: 1971-04-18

Runtime: 55 min

Episode 3 (Episode 3) 8.7

Air date: 1971-11-09

Runtime: 55 min

Episode 4 (Episode 4) 8.3

Air date: 1972-02-08

Runtime: 55 min

Episode 5 (Episode 5) 8.7

Air date: 1972-05-20

Runtime: 55 min

Episode 6 (Episode 6) 8.7

Air date: 1972-09-16

Runtime: 55 min

Episode 7 (Episode 7) 9.0

Air date: 1972-09-11

Runtime: 55 min

Episode 8 (Episode 8) 9.0

Air date: 1973-09-01

Runtime: 55 min

Episode 9 (Episode 9) 9.0

Air date: 1974-01-06

Runtime: 55 min

Episode 10 (Episode 10) 9.0

Air date: 1975-08-26

Runtime: 55 min

Episode 11 (Episode 11) 9.0

Air date: 1977-06-04

Runtime: 55 min

Episode 12 (Episode 12) 9.3

Air date: 1978-05-20

Runtime: 55 min

Episode 13 (Episode 13) 9.0

Air date: 1978-11-11

Runtime: 55 min

Episode 14 (Episode 14) 9.0

Air date: 1979-10-19

Runtime: 55 min

Episode 15 (Episode 15) 9.0

Air date: 1980-11-09

Runtime: 55 min

Episode 16 (Episode 16) 9.3

Air date: 1981-11-14

Runtime: 55 min

Episode 17 (Episode 17) 9.0

Air date: 1984-11-09

Runtime: 55 min

Episode 18 (Episode 18) 8.7

Air date: 1985-03-23

Runtime: 55 min

Episode 19 (Episode 19) 8.7

Air date: 1985-12-27

Runtime: 55 min

Episode 20 (Episode 20) 8.3

Air date: 1987-04-11

Runtime: 55 min

Episode 21 (Episode 21) 9.0

Air date: 1988-05-21

Runtime: 55 min

Episode 22 (Episode 22) 9.0

Air date: 1989-09-04

Runtime: 55 min

Episode 100 (Episode 23) 8.0