

Season 3
A romantic liaison in Istanbul threatens to expose a buried MI5 secret in London. When Jackson Lamb and his team of misfits are dragged into the fight, they find themselves caught in a conspiracy that threatens the future not just of Slough House but of MI5 itself.
| # | Title |
|---|---|
| 1 | Strange Games |
| 2 | Hard Lessons |
| 3 | Negotiating with Tigers |
| 4 | Uninvited Guests |
| 5 | Cleaning Up |
| 6 | Footprints |