#3

Used in "Bantam Menace"

Used in "Shadows of a Thousand Years"

Used in "Later, scientists at Area 51, working with fragments of the crashed spaceship, were able to reverse-engineer the technology for scramble suits"

Used in "Later, scientists at Area 51, working with fragments of the crashed spaceship, were able to reverse-engineer the technology for scramble suits" and "OMFSM it's a Giant Blemmys Pursuing Ann Althouse!"

Used in "OMFSM it's a Giant Blemmys Pursuing Ann Althouse!"

Used in "Invisible Piano" and "I for one welcome our invisible-piano-teaching alien overlords".

Used in "Like acid and oil on a madman's face"

Used in "With eyes on fire glowing like coals in the night"

Used in "The inevitable outcome of access to beer and genetic engineering tools, mixed with an overdue gardening column"

Used in "No one knew the meaning, All our efforts seem to fail"

Used in "A Long Day with All the Bark on it", Come and Take this World Without End