This is exactly why I miss IMDB's "I need to know" board. You could post a partially correct memory snippet from decades ago and someone would chime in with the answer. I had memories of movies I'd watched on TV as a young child. I had no name or context, but simply little moments stuck in my brain, and someone was able to resolve those to a title.
The closing of the IMDB message boards was a terrible loss IMO. You could visit an obscure actors message board, and you might run into someone who knew them. You could discuss a movie's intricacies with someone, and share theories, etc, on the specific board for that movie. It was a goldmine for movie fans, and I still miss it.