In the Battlestar Galactica episode The Living Legend part 2, the colonials attack a Cylon city on the planet Gamoray. As the attack starts, there's shot of a crowd of Cylons and other aliens running away.
(From 27:45 on the Netflix episode.)
There's reference to Cylon civilians earlier in this story, but there's also a mention of a previous population on Gamoray. Who are these silver-suited figures?