The show reminds me a lot of The Sentinel: great characters with questionable storylines. I did do background sheet for my AU when I did the first story, and the first story has pictures embedded, so those might help.
Prequel setting up the M7 AU -- http://litgal.org/M7/Sunstroke.htm
Background sheet for the AU characters-- http://litgal.org/M7/T7char.pdf
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Prequel setting up the M7 AU -- http://litgal.org/M7/Sunstroke.htm
Background sheet for the AU characters-- http://litgal.org/M7/T7char.pdf