Assembler
From Tardis Wiki, the free Doctor Who reference
Assembler were robots that constructed the furniture, include the UNIT ZX419 that the Cylander wanted from Galarias. They wanted Mel and Banto Zame to constructed it in 30 minutes. They thought it was impossible. When Mel and Banto tricked them into thinking the assembled it, they removed it from their memories. (AUDIO: The One Doctor)
