Get A Glimpse Into Sherlock and Kitty's Past in "The One That Got Away"

1. "The One That Got Away"

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

A flashback into Sherlock's time in London.

2. A flashback into Sherlock's time in London.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

The team continues to help Kitty.

3. The team continues to help Kitty.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Sherlock races to end the threat to Kitty.

4. Sherlock races to end the threat to Kitty.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Watson continues her efforts to help Kitty.

5. Watson continues her efforts to help Kitty.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Captain Gregson joins Sherlock and Watson in the search

6. Captain Gregson joins Sherlock and Watson in the search

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Watson attends a formal event.

7. Watson attends a formal event.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

A night out.

8. A night out.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Stuart Townsend Guest Stars as Del Gruner

9. Stuart Townsend Guest Stars as Del Gruner

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.

Kitty suffers an emotional crisis.

10. Kitty suffers an emotional crisis.

As Kitty begins to unravel due to the imminent threat to her safety, Sherlock and Joan intensify their efforts to help her. Also, the origin of Sherlock and Kitty’s relationship is revealed.