Joan of Arcadia - Season 2 - Eps 19: Trial and Error
Joan prepares to prosecute a case for a mock trial at school, per God's request, while enthusiastically planning a way to celebrate her one-year anniversary with Adam, who has secretly betrayed her. Joan surprises everyone with her passion in prosecuting a mock case against the equally motivated defense attorney, Grace. Meanwhile, while trying to hide his guilt from Joan as she plans a special anniversary night out with him, Adam decides to confess his wrongdoing to an appalled Grace. Meanwhile, Will investigates the murder of an eight-year-old girl and Helen continues her study of catholicism.
About Joan of Arcadia

Title: Joan of Arcadia
First Air Date: 2003-09-26
Last Air Date: 2005-04-22
Status: Canceled
Rating: 7.2/10 (from 78 votes)
Language: EN
Seasons: 2
Total Episodes: 45
Network: CBS
Genres: Sci-Fi & Fantasy, Mystery, Drama
Production Companies: Barbara Hall Productions, CBS Productions, Sony Pictures Television
Synopsis
Joan Girardi has begun acting a little strange since her family moved to the city of Arcadia. No one knows that various people keep introducing themselves as God, and then giving the teenager specific directions to do things. Unsure of what God wants, and if she's even sane, Joan tentatively begins to follow God's cryptic directives, all the while trying to retain a "normal" teen-aged existence.
Cast

Amber Tamblyn
Joan Girardi

Joe Mantegna
Will Girardi

Mary Steenburgen
Helen Girardi

Jason Ritter
Kevin Girardi

Michael Welch
Luke Girardi

Christopher Rodriguez Marquette
Adam Rove

Becky Wahlstrom
Grace Polk