Complex sentence: Although there is initial reluctance on both sides, Harry and Dempsey work as partners in a specialised task force, SI10, under their commanding officer, Gordon Spikings, played by the late Ray Smith.
Split into simpler sentences: Although there is initial reluctance on both sides, Harry and Dempsey work as partners in a specialised task force, SI10. SI10 is under the command of Gordon Spikings, played by the late Ray Smith.