Anyone says any variant of "frak":
just kind of wave your glass at the screen.
We hear any other specialized vocabulary
from Classic BSG, like "fumarello" or "Pyramid"
Someone lights up a cigar or cigarette
Adama gives someone a sleepy-eyed glower
Lee stammers, ducks his head, or otherwise looks nervous
Baltar answers Ghost Six and someone else with the same response
Ghost Six changes outfits mid-episode
Roslin mentions Kamala
We see more than one iteration of any Cylon model in the same
episode (two Sharons, three Sixes, two Dorals, etc.)
Ghost Six mentions God
One of the Colonials swears by "gods"
Ghost Six somehow physically interacts with Baltar (kisses
him, grabs his tie, slams him against a bulkhead, etc.)
We see Baltar's fantasy/memory house on Caprica
We see the legend "Cylon-occupied Caprica"
We see an eight-sided paper item (like photos, telemetry,
Anyone takes off or puts on eyeglasses
Cylon and human play snugglebunnies