|Title||FBI Special Agent|
|Spouse(s)||Unnamed woman (wife)|
|Kate Beckett (dated)|
|Appearances||"Little Girl Lost"|
"A Death in the Family"
"The Time of Our Lives" (mentioned)
|Portrayed by||Bailey Chase|
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.
Some time later, when Sorenson was investigating the kidnapping of Angela Candela, a two-year-old girl, he enlisted the help of Beckett and her team once again, recognizing Kate's skills in such cases despite their prior failure.
He and Castle swiftly developed a not-so-subtle rivalry over their competitive close relationships with Beckett, Sorenson being slightly surprised that Beckett defended Castle's skills, when he suggested he make the ransom drop (the kidnappers having demanded no police involvement in the handover). Castle subsequently proved crucial in discovering the kidnapper's true motives. ("Little Girl Lost")
Beckett was forced to make contact with Sorenson again while investigating the murder of plastic surgeon Doctor Joshua Leeds, having discovered that Leeds had been involved in giving a key witness in an upcoming mob trial plastic surgery, to help protect him during the Witness Protection. Sorenson was subsequently injured in a drive-by shooting, when the mob attempted to kill the witness, but he survived and was last seen conversing with Beckett in hospital ("A Death in the Family").
As of the end of season 4, Sorenson has not been seen since. But in Season 5, episode "Murder, He Wrote", his name was mentioned in the investigation between Esposito and Ryan to find out who Beckett's boyfriend is. Esposito later told Ryan that his FBI buddy told him that Sorenson has been stationed in Europe for 6 months.
In the season 7 episode The Time of Our Lives, it was revealed that Sorenson is getting married and had invited Beckett to his wedding.