Immortal Watchers

I've been thinking and found myself asking about Immortal Watchers. Surely Methos was not the only Immortal Watcher , statistically there is a high probability that there were others.

I expect that Methos would have encountered at least one latent, pre Immortal among the countless people he met in the organisation. Naturally he wouldn't have revealed himself or told them that they're going to be Immortal , but maybe while they were out " watching " their assignment , they would have been discovered. When Kalas had Roger hostage and tortured him until he revealed the Watchers, imagine if Roger was one and had revived , or maybe even if Joe Dawson was one. I can imagine that a Watcher could be going about his or her assignment and the was atttacked by a mugger or carjacker , then woke up Immortal , that would be interesting , would they remain with the Watchers and remain hidden while learning to survive?

Interested in your thoughts .