I've just started watching Criminal Minds and would প্রণয় to learn আরো about the show. Can আপনি give me any info on the characters and the background of the show??

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This is a great website if আপনি want the background on the প্রদর্শনী and the characters. (:
Given, it's simply wikipedia, but still.

Here's another good link:
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if আপনি really want to know আরো about criminal minds, আপনি might want to try and watch all of the episodes right from the very beginning like i did. but there are certain episodes that give আপনি আরো information about the characters backgrounds. (btw reid rules!)

FBI BAU Supervisory Special Agent/Unit Chief Aaron "Hotch" Hotchner
FBI BAU Supervisory Special Agent Dr. Spencer Reid FBI BAU Supervisory Special Agent Derek মরগান FBI BAU Supervisory Special Agent Jennifer "JJ" Jareau
FBI BAU Supervisory Special Agent Emily Prentiss
FBI Technical Analyst Penelope Garcia