Advanced Title Search for lists NOT your ownby bderoes-12985 | created - 10 Dec 2017 | updated - 10 Dec 2017 | Public
Even if you've never created a list, you can use Advanced Title Search (ATS hereafter) to analyze someone else's list beyond the Refine dialog (present just above the first title). Here's how.
Let's say you want to find the English language titles on the list http://www.imdb.com/list/ls027141736/ "Missing from the Top 250." You will need the List ID from this URL, namely ls027141736
Go to ATS, select English in the Language box, select one of your own lists (can be your Watchlist, even if it's empty), and Search. The URL will look like this: http://www.imdb.com/search/title?languages=en&lists=watchlist Now highlight the word "watchlist" in the URL box, and paste the target List ID (ls027141736) instead, which should look like this: http://www.imdb.com/search/title?languages=en&lists=ls027141736 Hit <enter> or tap on the go icon, and you get the search results for the target list.
If you want to compare 2 lists, say titles that are Included in one list, but Exclude titles in another, then set that up in ATS, and replace the List ID's in the resulting URL just as we did for one List ID above (be careful not to lose the "!" that immediately precedes the Exclude list): http://www.imdb.com/search/title?languages=en&lists=watchlist,!checkins
Hopefully IMDb will make this friendlier in the future. If you'd like to encourage that, vote for this suggestion at the IMDb forum.