It's a tiny note in yesterday's Red Hood And The Outlaws #4, one if the more surprisingly successful series from the DC Rebirth, alongside Flash and Detective Comics, was a little new nugget of continuity.

We knew that Jason Todd was locked up after he was brought back from the dead after being killed by the Joker and his first appearance as Red Hood. He was then committed to Arkham Asylum, until that all got sorted out.

But in this week's Red Hood & The Outlaws, as Jason Todd uses psychiatrist techniques to subdue Bizarro rather than fisticuffs, he reveals that at Arkham, his psychiatrist was one Dr Quinzel. That's Dr Harley Quinzel.

Harley Quinn.

I do hope she has preserved doctor/patient confidentiality.