Huh, so it wasn't just an assumption

[firefly124]

Rewatching "The Sontaran Strategem." And Martha really did say she was engaged to Tom Milligan, who is off in Africa for some reason. So it wasn't just an assumption that was who she was engaged to, both at this point and in "Reset," since "Exit Wounds" obviously occurred before "Journey's End," which is when she'd have met Mickey anyway.

Really, really hoping for some backstory to make sense of that switch.