Complex sentence: Josef Ber's character, Sergeant Dominic "Dom" Wales, was originally scripted to be killed off however during production of the first season, Van der Boom had her US working visa approved for which she had forgotten she had applied.
Split into simpler sentences: Josef Ber's character, Sergeant Dominic "Dom" Wales, was originally scripted to be killed off. However, during production of the first season, Van der Boom had her US working visa approved for which she had forgotten she had applied.