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Apartment 3A in the The Apartment Building is currently unoccupied and is empty by Season 10. Leonard Hofstadter once remarked it as "Third floor. Wrong apartment".

Appearances []

  • In The Gyroscopic Collapse, the military takes away Sheldon, Leonard and Howard's guidance system and leaves the room they work in bare to the floor, the trio accidently walks into Apartment 3A and freaks out because they thought the military also cleared out Sheldon and Leonard's apartment.
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