Let's try a little discussion, shall we? ;)
Although their ages have never been stated on the show, if we go by their actors' ages as indicative of the characters', Weir and Caldwell have a significant age difference between them -- roughly fourteen or so years.
(TH was born in 1966; MP was born in 1952. As an aside, MP's real-life wife Arlene was born in 1966, too.)
Does the age difference matter? Do you, as a reader/writer/fan/hater of this pairing, think it matters? Especially in a sci-fi series? What sort of issues might it bring up if there was a relationship there? Would either of the characters have a problem with an age difference?
Other thoughts, opinions, questions, concerns are welcome!