India, Sept. 23 -- Slow Horses Season 6 Episode 2 ending explained: The latest episode of the Apple TV spy thriller ends with a major surprise as Sid Baker finally returns. River Cartwright thought he was following a trail connected to his father, Frank Harkness. Instead, he comes face-to-face with a former Slough House colleague who was believed to be dead.

Episode 2, titled Daddy Issues, premiered on September 23 and follows the fallout from the suspicious deaths of former Slough House agents. Frank Harkness is back in the picture, while Lamb and his team realise that the danger may be much closer than they thought.

So, who is Sid Baker? And how is she still alive after being shot in the head in Season 1?

What Happened In Slow Horses...