If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) Oh. Ah. Dark brown hair. Definitely human. Well, the greater sciatic notch indicates a male. The auricular surface indicates an age range between and . Huh. A central incisor. Not in any way connected with the foot, of course. (..)2014 TvShow: Bones Title: The Master in the Slop Season: 9 Episode 14