Looks like a discussion topic to me. Particularly since there has been, y'know, discussion on the topic of series regulars directing episodes.Have you tried IMDb? (It’s not a discussion topic, only research.)
1. Not off-topic, if they are talking about series regulars directing episodes, or movies, or related little sidebars.They’d be off-topic, not to mention that nobody will read 47 pages of resulting meandering discussion, merely come in on page 48 and comment on the basic question again, which will then be riffed on in ways very similar to those on pages 17-24 (but not quite)…
2. Nobody will read a long thread? We have some threads here with thousands of posts, and still very active.
3. Meandering discussion? Maybe, maybe not. We won't know until we see how the discussion goes. It's quite typical for a thread to ebb and flow. And if it strays too far, I hear they have moderators who would steer the thread back on topic.
4. We always welcome new members to a topic, even if they haven't had a chance to read through a long thread. In fact, they might offer a new perspective that would stimulate discussion.
Actually, the purpose of a discussion board is for members to have discussions. We always encourage that. Basic research and discussion about the results of that research can happily co-exist.I’m off-topic for saying that the answer to this straightforward question can be found on IMDb, then explaining to The Green Monster why it’s a good idea to stay on-topic? Don’t we want to encourage everyone to do the most basic research rather than fire off a question and wait for free answers?
1. Since discussion has already ensued, I don't think it's necessary to retitle the thread.Someone can always retitle the thread to make it cover more ground, but I just said why 100-page threads are discouraging to new participants.
2. The thread will be 100 pages now? I guess this means you expect this to be a popular thead. Win!
3. I'll leave it up to our members to decide whether they want to dive into a long-established thread. Personally, I have found some long threads to be well worth perusing and enjoying, and others, not so much. To each his own.

On with the discussion!