Most miracles occur in hindsight
Joan is a teen who happens to be able to talk with God. Before you groan and click to another article, let it be known Joan of Arcadia is a great show. Never turns preachy or sickeningly sweet. There are certain rules in the show that prevent it from being Touched by an Angel. There is no miracle that saves her if she gets in trouble. There is no miracle where Joan's brother jumps out of his wheelchair fully healed and no signs that this is going to happen.
Lots of humor and very good writing. Funny lines, interesting characters, realistic dialogue, good acting, plot lines are interwoven without being confusing and can be enjoyed even if you miss an episode. Usually has a beautiful ending where the episode gets tied together. Let's you think about how God interacts and what effects simple actions can have on the people around you. The relations between the family members is done in a realistic manner.
A big part of the show is the wheelbound brother of Joan, a former athlete about to go to college on a sports scholarship before he got into a car accident. He is bitter and angry about his disability but still makes jokes about his condition. The parents are confused on how to deal with him: push him, allow him more time? Joan is given seemingly urelated "assignments" from God often help her family. These include "build a boat" and "learn to play chess".In the first episode her assignment of "get a job at a bookstore" helped her brother out in a subtle way (and at the same time caught a criminal).
Which leads to a few minor flaws in the show. Joan's actions have helped indirectly catch two criminals so far (her father is the new Chief of Police in a less than stellar police department). A little credibility stretching, but since it didn't involve her wrestling them to the ground I am willing to forgive it. Her actions merely helped get others into the right place and right time to solve the crimes. Also, even if Joan doesn't help solve the crime there has so far been some major crime committed every week that sometimes distracts from the plot threads where Joan is doing what God told her or from the family dealing with each other.
So far there have been four episodes and I have thoroughly enjoyed each. Currently kicking the butt of its competitors on Friday nights for good reason. Usually when I enjoy a Friday night show it gets cancelled, but looks like this one is gonna break the curse. My new favorite show.
TeeVee.org: A much better article than mine on Joan of Arcadia
Episode Recaps: At least read the pilot episode recap and see if it is interesting or not.
"I think prayer can never hurt, as long as you understand you might not recognize the answer right away. Most miracles occur in hindsight." -hapless priest in DMV parking lot responding when Joan's mother asks him whether praying for a personal miracle (she is obviously thinking of her wheelchair bound son)