Using Google's movie showtime listings, this script finds consecutive showings where you can "double dip," AKA watch one movie immediately after another. Just select the movies you are interested in seeing and a sortable table will appear showing which ones you can watch back-to-back.

At the top of the page, adjust the minimum and maximum times between end and start of movies to your preference. Hold shift and click on the table headers to sort by multiple columns. Since version 0.5, you can now search for multi-dips greater than two! (If you have the stamina!) Just change the "Num. Dips" selection. Beware though that selecting high numbers (5+) can get pretty slow.

For the record, the script author does not endorse sneaking into the second movie without paying! ;)

This script also removes google's link tracking.

(Tested in Firefox with Greasemonkey and Chrome with Tampermonkey. Please give me feedback if you have any issues!)

Changelog:
0.5:
Added the ability to dip on more than two movies.
You can click anywhere on a movie's section to select it, not just the checkbox.
Mousing over a movie will highlight its matches in the table.

0.4.1:
Prevent matches between 2D and 3D version of the same movie.
Tables now update after tolerance is changed.

0.4:
Fixed issue with movies whose duration was "Xhr 0min".
Table now only shows if there are matches.
Minor speed improvements and cleanup.

0.3:
Fixed issues from switching to updated version of tablesorter as required by greasyfork.
Removed some logging messages.
Updated default start/end tolerances.

0.2:
Initial release.