Complex sentence: He has arranged for Ewart to be killed but James and Dana save his life for which Zara is very grateful and apolgises for keeping him in the dark and awards him and Dana the black shirt.
Split into simpler sentences: He has arranged for Ewart to be killed but James and Dana save his life for which Zara is very grateful. She apolgises for keeping James in the dark and awards him and Dana the black shirt.