This was a new kind of Dalek, a Diplomatic Dalek.
It had infiltrated the Koovari worlds, where the Daleks were as yet unknown, pretending to be a peaceful envoy.
Now it slid quietly through the gala reception, listening to everything, noting the weaknesses of every species present. Its advanced training suppressed the instinct to immediately exterminate the filth.
An orchestra started playing.
A very tall, very slender Koovari female approached.
“It is our custom that the guest of honour should lead the dancing.”
The female took the Dalek’s “arms”, and the couple waltzed away, slow, graceful and majestic.