Michelle Gomez - most recently known for her role as the Doctor's best frenemy Missy on Doctor Who – will make a guest appearance as the Lady on tonight's episode of Gotham.
Gomez was listed as part of the cast when the episode synopsis was released on Nov. 6, and posted the below photo to Twitter on Nov. 9, offering a possible first look at her appearance.
Who exactly the Lady is remains a mystery, though some fans have speculated that she may be the deadly assassin known as Lady Shiva in the comics.
Gotham airs Mondays at 8 p.m. ET on Fox