'Castle' Season 6 cast photos: Nathan Fillion, Stana Katic and the rest
Nathan Fillion and Stana Katic star as Rick Castle and Detective Kate Beckett.
Jon Huertas as Detective Javier Esposito
Seamus Dever as Detective Kevin Ryan
Tamala Jones as Dr. Lanie Parrish
Molly Quinn as Alexis Castle
Susan Sullivan as Martha Rodgers
Penny Johnson Jerald as Captain Victoria Gates
"Castle" airs Mondays at 10 p.m. ET/PT on ABC.