Complex sentence: Following Ros' death in the ninth series, Harry reinstates Lucas as chief of Section D. This makes Lucas responsible for the integration of two new team members into the section, Beth Bailey (Sophia Myles) and Dimitri Levendis (Max Brown).
Split into simpler sentences: Following Ros' death, Harry reinstates Lucas as chief of Section D in the ninth series. Lucas will attempt to put together two new team members into the section, Beth Bailey (Sophia Myles) and Dimitri Levendis (Max Brown).