I had never seen an episode before finding season 4 at the library. Confusing at first with all the clones. The story is black and crazy but full of dark humour, amazing and the biology is mostly accurate and possible. Tatiana is incredible, géniale, gifted and good-looking. The other actors hold their own. The serie has a futuristic look with old-fashion bat-cave and stuff. Quite incredible that the story could use so many characters yet hold and be unpredictable at the same time.