Smiler
From Tardis Wiki, the free Doctor Who reference
The Smilers were a make of androids that were aboard the Starship UK.
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The Smilers were mounted in booths around the Starship UK. At any time a citizen broke the law or was deemed unnecessary, the Smilers would take action. The Smilers rotated their heads to show three faces: happy, angry (for warnings), and malevolent (when attacking). While they initially appeared to be merely heads, in extreme circumstances they could be made to leave the booths and attack. They could also quickly repair themselves when damaged. The terrified population kept their booths clean and never dared get too close to them. (DW: The Beast Below)
File:Smiler Faces.jpg
The 3 Faces of the Smilers; happy, angry and malevolent. (DW: The Beast Below)
