What are some of the changes in the main cast for the American police procedural television drama series FBI: International season 3, and what is the premise of the season as described in the text?

Some of the changes in the main cast for FBI: International Season 3 include the departures of Luke Kleintank as Scott Forrester and Heida Reed as Jamie Kellett. In their places, Christina Wolfe joins as Amanda Tate. The premise of the season as described in the text is that it follows the International Fly Team as they tackle various cases across different countries, highlighting their expertise in solving crimes across borders.