SCP-049 is the Plague Doctor, one of the most famous entities from the SCP Foundation, a collaborative horror fiction wiki that began in 2007. The character appeared in the indie horror game SCP Containment Breach (2012), where he stalks the player through the facility and utters lines like 'there you are' when he closes in. The clip spread through horror edits, TikToks and soundboards as a shorthand for a calm, unstoppable threat, and it remains popular with creators making SCP lore videos, analog horror and Halloween content.