So hey, we never got a chance to hash out previous CR in my intro post. I believe you've said Lyall is the/a health teacher in addition to biology? Because I feel like Fred would have taken chemistry instead, but I've never encountered a school where they offered an alternative to health.

Also he's got a sister, probably either a junior or a senior right now, who'd be in AP Bio. I ought to figure out a name for her, but that's a potential point of second-degree familiarity.

(Also also, I am amused; much about Fred is based on another AU version of Felix that I made years ago. This other version taught high-school biology and had as his PB someone who played the Doctor. A slightly later Doctor than yours (David Tennant), but it's a curious coincidence.)