character, environment, era, title

After reading it today, I was very surprised. According to the novel, I thought that Charles should be a young man obsessed with fossils. It would be strange to replace it with Jeremy Irons. It feels different from the original text. Should I change it to "The French Lieutenant's where~~" because the Chinese meaning is a bit like that.
Also, does the original text contain the story of Mike and Annie on the set? I don't seem to have seen it, or am I being too careless, what did I miss? In the original text, it should be a story from the 19th century. In the movie, if I remember correctly, it feels like the 20th century. It's a bit confusing in the times, maybe I need to sort it out.
The feeling at the beginning was the same as my impression of the costumes and characters in the novel, but it started to be different later.

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