The main problem with Timeline is that the characters in the present are pretty uninteresting and very underwritten for the screen, while the characters in the year 1357 are much more interesting. The story unfolds and just plods along, and it's just ... tepid and very shallow in terms of characterizations given what is happening to them. The 3rd and final act is the most interesting part of the movie because you get to see some pretty neat medieval battling going on, while the characters try to not change history with their presence and actions there, but the story relies on the classic time paradox loopiness to explain what they encounter in the first act of the movie and how it comes to occur by them going back in time in the first place. Since this was a Richard Donner directed film, I had semi-high hopes, but the movie just never really gives you a good reason to invest yourself in the characters enough to care how things turn up given the setup in the initial first act. I give it 2 stars, or a grade of C.