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NateTheGreat
Since: Jan, 2001
EponymousKid
Since: Jan, 2001
15th Feb, 2011 08:14:15 PM
This premise specifically isn't really a trope, but in a larger sense I'm positive we have the "some event causes backstory and characterization to be expounded upon for everybody" thing someplace.
Wrestler, bodybuilder. No hopes, no dreams.
I would call this "Visiting Psychologist." It's similar to "Sensitivity Training."
A visiting psychologist talks to all the main characters who react in predictable or unpredictable ways. Some are scared that s/he will be found wanting. All the neuroses and tics come out. Some are defiant and belligerent, some study up to try to say the "right" thing, some refuse to even be interviewed and are badgered by the boss until they comply.
At the end, the psychologist decides everyone's okay.
Examples:
Homicide, Life on the Street: "See No Evil" http://en.wikipedia.org/wiki/See_No_Evil_%28Homicide:_Life_on_the_Street%29
NCIS: "A Man Walks Into A Bar" http://www.ncisfanwiki.com/page/8.14+A+Man+Walks+Into+A+Bar
...
I believe there was an episode of M*A*S*H where Alan Arkin played the visiting psych.
All episodes of The Sopranos.