Q. I have a question is about the angels held in chains (the watchers). Did these angels fall with the original group of angels that followed Satan or did they fall at a later time? Thanks for your response.
A. Some believe the watchers were a group of angels who were tasked to observe the behavior of early mankind. In the process they became attracted to human women and married them. Their offspring were the Nephilim of Genesis 6. This view stems partly from the non-Biblical Books of Enoch, but may also be hinted at in Jude 6. From 2 Peter 2:4 we learn they’re being held in chains for judgment.
I believe Satan’s fall occurred before man was created, probably between the first two verses of the Bible. I base this on a literal reading of the Hebrew language in Genesis 1:2, which in effect says “But the Earth became an uninhabitable ruin.” Some study Bibles offer this as an alternative rendering in their footnotes.
If this is true, it would mean the watchers were not part of the original rebellion in Heaven.