Frederick (portrayed by Dan Donohue) was a minor character from the TV series Agents of S.H.I.E.L.D.. He was once an employee of Momentum Labs, working with a team experimenting with an ancient grimoire known as the Darkhold. Through these experiments, the team were able to develop advanced quantum batteries that harnessed inter-dimensional energy.
However, Frederick and most of his colleagues were betrayed by Eli Morrow, a member of their team who wanted godly powers for himself. He sabotaged an experiment involving a quantum particle generator, supposedly killing his colleagues and trapping their essences within quantum batteries so that they could power the particle generator. Frederick and the others were instead transformed into ethereal, ghost-like entities, trapped in the quantum batteries for years with no sense of time. After Lucy Bauer was released from her battery by a group of criminals, she released her colleagues and they plotted to take their revenge against Marrow.
Death[]
While Lucy and the others planned to find Marrow and the Darkhold, Frederick remained at the Momentum facility with the intent of destroying it. As he activated the particle generator, Leo Fitz and Alfonso Mackenzie of S.H.I.E.L.D. arrived to investigate. Frederick attempted to touch Fitz, but was suddenly interrupted by the arrival of Robbie Reyes, the Ghost Rider. The rider canceled out Frederick's intangibility and then incinerated him with hellfire, leaving no trace of him behind.