Season 4
2021 · 13 episodes · 6h 45m in all
New enemies appear to block the Tokusou 9. As in the past, the Tokusou 9 hold on to their belief that "the case will be solved at all costs" and put their all into solving cases.

Episodes

1. Gray Suspect
7 Apr 2021 · 45 min
A young woman's stabbed body is found about 10 days after her death in a vacant store in a multi tenant building. The Tokusou team begin investigating, discovering her identity and the fact she promised to meet a man on the day of her death. Meanwhile, the suspect of a murder-robbery case is claiming he saw someone else do the crime.

2. Murder Designer
14 Apr 2021 · 45 min

3. Best Day
21 Apr 2021 · 45 min

4. Prayer
28 Apr 2021 · 45 min

5. Killing Blueprint
5 May 2021 · 45 min

6. Cursed Picture
12 May 2021 · 45 min

7. Murder Puzzle
19 May 2021 · 45 min

8. Hedgehog in a Locked Room
26 May 2021 · 45 min

9. Flying Suspect
2 Jun 2021 · 45 min

10. Episode 10
9 Jun 2021

11. Episode 11
16 Jun 2021

12. Episode 12
23 Jun 2021
- 13
13. Episode 13
30 Jun 2021
Special Investigation Nine Season 4: quick answers
How many episodes are in Special Investigation Nine Season 4?
Season 4 of Special Investigation Nine has 13 episodes, about 7 hours in total.
When did Special Investigation Nine Season 4 come out?
Season 4 premiered on 7 Apr 2021.