Later in the episode it is revealed that the Lord of the manor has been systematically abusing young children living on the estate but whether or not Hathaway has been one of his victims or has been aware of what went on is not discussed.

[3] In the last episode of series 5 Hathaway informs Lewis that he was talent spotted for MI5 in university; this is neither confirmed nor denied by the end.

He later left the seminary guilty over the orthodox but ultimately deadly advice he gave a gay friend about coping with his homosexuality.

[4] This was detailed in the third episode of the second series ("Life Born of Fire"), unlike Lewis, Hathaway's guilt at sharing the homophobic attitudes of some of his fellow trainees is revealed when he discovers that a suicide he is investigating is a former friend, Will McEwan, who broke off his friendship with him when Hathaway urged him to reject his homosexuality and that he would be punished by God for it.

At the beginning of the episode "Your Sudden Death Question," he gets ready to head to a festival of world music, toting his guitar, a Gibson L-5, which he refers to as "she."

[3] In "The Point of Vanishing", it is disclosed that Hathaway and DS (now Inspector) Fiona McKendrick were romantically involved for some period of time.

In "Life Born of Fire", there are hints that Hathaway may have had a close relationship with or a romantic interest in one of the male characters (Jonjo Read) but this is never made explicit.

In "The Dead of Winter", Hathaway appears to become romantically involved with a woman from his early teenage years (by going out on a date and then leaving her flat the next morning) who may or may not be suspect in a murder investigation.

"The Soul of Genius", the first episode of series 6, highlights Hathaway's awkwardness with women, with him being so nervous while talking to one that he ends up bowing to her, to which she replies with an exaggerated curtsy.

It's deliberately left open with multiple opportunities as to fan theories for viewers to decide for themselves on Hathaway's sexuality, although it's never formally defined.

"Hathaway, the image of the mature, educated, even sophisticated postmodern believer, holds his faith a closely guarded secret.

The most viewers know about him is that he left the seminary guilty over the orthodox but ultimately deadly advice he gave a gay friend about coping with his homosexuality.