As a former lecturer in Arabic and Islamic Studies, who has written a major report on radicalization in Muslim schools, and who has written many articles about radical Islam, I was worried that this series might be filled with all sorts of misunderstandings and inaccuracies and mistakes. In fact, it was well researched, down to subtle things such as distinguishing between jihad al-akbar and jihad al-asghar, using both terms in Arabic. And saying fard (duty) without translation. The portrayal of ISIS in Raqqa seemed to me most convincing, based as it was on authentic film and reportage. As the author of ten international thrillers (several bestsellers and three or four with Islamic themes), I found the tension well built, making many episodes nail-biting. The characters are well developed, if at times frustrating. I have taken one star off on account of the coincidences and other plot holes. Despite these, the series works in terms of character, pace, and plot lines. I strongly recommend it to anyone who likes well written and well performed drama that will keep one watching through the eight episodes with speed. As for the several people here leaving 3, 4, 5 or other low ratings, I would pay them no heed at all.