Yes, NBC an Sony are going to be sued for plagiarism. The producers of "El Ministerio del Tiempo" were in negociations with Sony, gave them the scripts, the show's ideas and all, and they were on it, they liked the show enough to make the american version of it but suddenly they said no and backtracked with no explanation. Now we know why.
It's not that both shows have a similar premise, it's that Timeless copy so much from EMDT that it hurts. As a Ministry of Time fan - we are called "ministericos"- , I would have loved an american version, but not like this. I will watch "Timeless", but even when I might like it, I won't, I can't betray my love for a series that made me wait for Monday nights eagerly, something that didn't happen to me since X- Files.