Question for Trek (well, Enterprise) fans

[starlady]

Trek fans who have gone more boldly than I have, into the farthest reaches of the fifth series, I have two questions for you! I humbly beg of your knowledge and opinions.

# If I were going to watch one (1) episode of Enterprise showcasing the relationship between Archer and T'Pol, what one (1) episode should I watch?

# If I were going to watch one (1) episode featuring T'Pol after her exposure to Trellium-D, which one (1) should I watch?

FYI, I am planning to watch the series finale. Anything I should know about how that relates to the rest of the series? Because I have Heard Things.

So many thanks in advance, you have no idea.