Dawn Harvey

During the darkest days of the Cold War, a consortium of corporations and government agencies conducted secret research into time travel. Decades later, a couple of backyard mechanics uncover a smuggled cache of documents from those officially-forgotten experiments. Hacking together their own device tests their know-how, their dreams of sudden wealth, and their friendship. Can they survive the limits of dwelling in the past? (imdb)

Fraternal twins Nikki and Nora are forced back into each other's lives when they inherit a detective agency and work together to solve a murder. (Peacock)