Sneaking Angel
From Tardis Wiki, the free Doctor Who reference
Sneaking Angels were one of the species Steven Moffat was considering introducing to Doctor Who in his efforts to match his previous successes, alongside Peeking Angels. Post-it notes bearing their names were present on a wall of his underground writing lair below 221B Baker Street when Christel Dee broke in to steal the scripts to Series 9. (NOTVALID: Stealing Series 9 Scripts)
