Daniel Whitehall (formerly known as Werner Rienhardt) is a high-ranking member of HYDRA who appears in Agents of S.H.I.E.L.D., and serves as the secondary antagonist in Season 2 up until his death in "What They Become" (though even after that, his actions still cause everything that happens in the second half to happen regardless) and the series' incarnation of the Kraken, a HYDRA agent from the Marvel Comics universe. He is portrayed by Reed Diamond.
- Much like Garrett and the Red Skull before him, he is considered a Complete Monster.
- Though he dies halfway through the season, he can still be considered the main villain and Big Bad of the season because his sadistic dissection of Jiaying traumatically turned her into a villain and there is nothing else that could have happened to her that would have caused her to do the things she did. It is reasonable to say that he is more deserving of the blame than her for her attempts to start a war against S.H.I.E.L.D.