Casting Director Alex Irwin Makes Murderers Every Episode

Warning: This episode contains spoilers for Episode Four of the Seventh Season of Grantchester. There's a rotating cast of murderers — and murder victims — on every episode of Grantchester. But where do the actors come from who populate the Cambridgeshire rogues’ gallery? Longtime series casting director Alex Irwin reveals how she casts a show.

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MASTERPIECE Studio is your backstage pass to the PBS series—from Sherlock to Poldark. After the show, turn off the TV and tune in to MASTERPIECE Studio for the scoop with host Jace Lacob. Listen for exclusive interviews with the cast and crew of your favorite shows. Get the history lowdown behind the people and places you see on screen, and hear revealing stories from the set. MASTERPIECE Studio is made possible by Viking Cruises and Raymond James. Sponsors for MASTERPIECE on PBS are Viking Cruises, Raymond James, and The MASTERPIECE Trust.