Prime Video
- "Citadel," Amazon Studios' ambitious spy series, is on track to be one of the costliest series ever made.
- Amazon hopes the show, premiering April 28, will set it apart from Netflix and other streamers.
- But it's been dogged by cost overruns and creative clashes, and some ask if the risk will pay off.
"Citadel" is an example of the kind of programming Amazon hopes will set it apart — tentpole entertainment that can attract a global audience. Since the project was announced in 2018, it has become one of the most expensive TV series ever made.