S03E11Person of Interest season 3 episode 11: Lethe
Aired 17 December 201343 minRated M
Where to watch Person of Interest Season 3 in Australia
Person of Interest season 3 is streaming in Australia on Netflix (subscription). You can also buy it on Apple TV from $29.99 and Prime Video Store from $29.99.
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Availability checked 16 November 2026.
What happens in “Lethe”
Flashbacks to Finch’s adolescence provide insight into his creation of The Machine. Also, the team receives the number of an already dying man, and Reese leaves the POI team behind in the aftermath of the war with the crime organization, HR.
Episode summary: TMDB.
Before you watch
- It is episode 11 of 23 of season 3, so watch episodes 1 to 10 first.
- It runs about 43 minutes.
- Directed by Richard J. Lewis, written by Erik Mountain.
- TMDB users rate it 8.5 out of 10 (40 votes).
Person of Interest trailer
The official trailer for the series (no preview of this episode has been published).
Play video: Person of Interest trailer
Cast and crew of this episode
- Director
- Richard J. Lewis
- Writer
- Erik Mountain
- Guest stars
- Boris McGiver as George HershLeslie Odom Jr. as Peter CollierSaul Rubinek as Arthur ClaypoolTom Degnan as Agent EastonTuck Milligan as Finch's FatherChris Bert as Young Harold FinchCamryn Manheim as Diane ClaypoolParker Brightman as Young Harold
Credits: TMDB.
More from Person of Interest Season 3
Every episode of Season 3Person of Interest episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.