Will Sorenson is a character played by Bailey Chase in the ABC crime series Castle. Sorenson was an FBI Special Agent specializing in kidnapping cases. At some point prior to her first meeting with Castle, Detective Kate Beckett worked with Sorenson on a kidnapping case involving a young boy. The investigation lasted for six months - resulting in a relationship between the two during that same time frame - but ended with the boy being found dead and them going their separate ways, possibly with the one precipitating the other.