There is probably a magic marker that makes the daylight turn a little darker,
yes m'lady, said Parker, but this is Thunderbirds where words don't match precisely to our actions and scenes change less fluidly,

Lady Penelope smiled, and thought to herself,
Parker really needs to keep his gob shut,
then said,
good point Parker but why can't we see the magic marker?

Parker replied, because it gets darker, m'lady.

this wasn't about that, someone must be pulling my strings.