@col-klink I have not seen Shadowlands, but I've heard it's good. I think the child actor who played Douglas Gresham (from reading on IMBD) was also on Jurassic Park. 

I've heard that the Most Reluctant Convert was good. I might stream it one day and watch it.

Shadowlands is certainly far from perfect, but I think it does a good job conveying ideas that were very important across Lewis's life and works, and it does so in an emotionally satisfying way. When it was over, I felt a sense of grief mingled with hope.

So, the fact that the movie takes many liberties with history ends up feeling irrelevant to me. That's not the point of the movie. A documentary can show the facts. A movie can show what they mean and why they matter.

"[Shadowlands is] fiction and makes no pretenses about that, but the emotional values are absolutely spot-on accurate."

- Douglas Gresham

Regarding the BBC version, I just remember it being pretty dull.

I have seen all three versions (play, movie, television presentation) at some point or another.  I have reasons to like each over the other depending on what aspect you are talking about.   I thought they all did a good job of portraying the story, however, I would have changed the cast up a bit.  Claire Bloom was not who I would have picked to be Joy, and I think Joss Ackland was better casting for Lewis than Hopkins.   

Shadowlands to me was never supposed to be historically accurate.  It was just supposed to portray a relationship between two people who had a soul connection and how it met some of the greatest challenges life can throw you.

I have seen the original 1985 TV Play, the 1990s film, and the stage play (3 separate productions, including one starring Hugh Bonneville in 2019).
[I'm aware that my perceptions, as someone who was a child when Lewis died, and with an English upbringing and world view, are different from people in their 20s and 30s, who have never been to England or met an Englishman. I'll be interested in responses to my ideas.]

My favourite remains the original. I have it on an old VCR tape from when it was shown on TV here in the mid 1980s. It was moving and real, and stars the excellent Jos Acland who had the right look as well as the right feeling for Jack Lewis. (he played Professor Kirke a few years later for the BBC serial of LWW).

You can watch it here:  https://watch.redeemtv.com/shadowlands-c-s-lewis

(there's a free registration to access the site)

[I am following up a lead about the storyline being based on Edwin Brown's book "In Pursuit of C. S. Lewis".]

Most people know the film starring Anthony Hopkins, but he was never the right actor for it. He didn't look right, feel right, sound right.
In fact, five years earlier he had played a similar role in the film 84 Charing Cross Road, in which he was a diffident Englishman corresponding with an outgoing American woman in the 1940s and 50s. Some people found it hard to separate the two films, and therefore mixed the two characters in their minds!
I think the film set of The Kilns was well done (I have heard Doug Gresham's comments on it - and saw it myself two years ago), and they were also wise to have deleted David Gresham from the story. 

The stage play was presented by our local professional company in 1992, the year before the film came out. It was very moving to see it so close up. In May 2019 I went to see it at Chichester while I was living in London; a few things about the staging and characterisations were odd, but I did like watching Bonneville as Lewis. Both Jack and Warnie Lewis were played as real gentlemen, which I have been assured is accurate; the previous production I saw had made too much of Warnie's drinking [it got worse in later years].

A final link to a review of the film:  It is really worth reading, and has suggestions for biographies at the end.

https://cslewis.drzeus.net/papers/shadowlands-review/   
The writer of this said he used to say to people who asked him about the movie, "I thoroughly enjoyed it. I just wish it had been about C. S. Lewis."

(as mentioned in this article, the film has cut out most of the issues of faith, which were so crucial to this couple; it reduces Jack's faith to his radio talks at the beginning, and claims that he lost his faith after Joy's death)

I'll let you guys in on a secret. (Well, actually, it's not a secret, but saying it is makes for a better opening sentence.) I don't really care about historical accuracy in biopics and other similar movies. If I did, I'd have to do research on every movie based on a real person or event before I could say whether it was good or not, and I'm just not interested in history or biographies enough to do that. If I do know of something particularly inaccurate about a specific book or play or movie like that though, I do usually try to tell people when I recommend it to them. I wouldn't want to be accused of spreading false information.

BTW, there's something that I believe was inaccurate about Shadowlands the play, which the theatrical movie fixed, and which I actually liked. It referenced The Magician's Nephew early on, which I don't believe C. S. Lewis had written at that point. (Or it hadn't been published at least.) The movie referenced The Lion, the Witch and the Wardrobe, which had actually been published, instead. Fewer people have read MN than LWW, so referencing it strikes me as less lazy and, unlike LWW, it actually relates thematically to Shadowlands. Plus I just love MN more as a book. So there's one historical anachronism of which I heartily approve and if the BBC version retains it, more power to it.

Did you like the movie Shadowlands with Anthony Hopkins and Debra Winger?  I thought Anthony Hopkins was quite good as Lewis and Debra Winger was fine as Joy.  The older BBC TV film from the  1980’s Through the Shadowlands was more accurate since both of Lewis’ stepsons were characters in it. I think both of the films are well worth watching, although the newer one is more like a Hollywood production.  I would recommend both movies, but I think the film with Joss Ackland and Claire Bloom is better and more authentic to Lewis’ life.  Both films show Lewis’ grief very effectively when Joy passed away from cancer.