I remember seeing this in the movie theater when I was a boy; I'm the same age as Bill Mumy and was always interested in his shows.
Like many movies it's important to understand the times in which the movie was produced. This was the age when the computer was moving from a science fiction tool to a daily part of life. Many of the themes in the movie were things that people were wrestling with every day. A decent father trying his best to raise his children right but trapped in his own perceptions of life. A daughter grown up in a completely different age. A young boy who is a mathematical savant in a family of liberal arts specialists. The mother doing her best to uphold the respect her family and children deserve. All held together in a very off beat setting.
All of this makes for a unique comedy that to me has grown with age. No, it's not a knee-slapper. But there are interesting themes being played out that grow as you watch. The ending of a child's innocence. The brutal march of technology. The desire to hold on to traditions deemed vital. And in the final scenes, the knowledge that with all our desire to control the future, luck and pure chance will have it's say.
And Brigitte Bardot's part is.....how do I say it......wonderful? She comes across as interesting and genuine. I think it's a great role.
Don't expect pie-in-the-face-fun. If you can't wrap yourself around the show and the times it's understandable. It's quirky and offbeat and wasn't pre-shown to theaters so they could write the script, the script was written and shot and there it is. But if you have it a chance (or two) you'll be pleasantly surprised.