A murder investigation launches Castle into what seems to be an alternate universe where he's never met Kate Beckett. Castle has to convince Beckett, Esposito and Ryan -- now complete strangers -- to let him participate in their investigation so he can find his way back to his own world. This inspires Castle & Beckett to finally take a trip to the altar.
Keywords: criminal-consultant , criminal-investigation , female-detective , homicide-detective , new-york-city , novelist , police , police-procedural , writer , watch-series-online