Mrs. Flood's cameo at the end of "The Well" reveals she knows about the Doctor's Vindicator, and declares it to be "very good news" that the device is being utilized.She doesn't say she's so ...

Mrs. Flood is the Rani in Doctor Who Season Two, Actually . Mrs. Flood is the Rani, that’s how. She’s a renegade Time Lady who is back after many years away.