Complex sentence: When Grossmith's father suffered a fatal collapse, Thornton took over in mid-performance to allow his colleague to go to his father, and played Sir Joseph and Deadeye at other times during the run.
Split into simpler sentences: When Grossmith's father suffered a fatal collapse, Thornton took over in mid-performance to allow his colleague to go to his father. He played Sir Joseph and Deadeye at other times during the run.