Welcome back to the Law School Toolbox podcast! Today we're focusing more on Joinder, or who can and who must be party to a civil lawsuit. In particular, we look at intervention, impleader (or third-party action), and class actions. We previously covered permissive and required joinder in Bar Exam Toolbox podcast episode 145. In this episode we discuss: The five types of joinder Intervention as a right and permissive intervention When impleader (or third-party action) comes up What is a class action? Examples illustrating the different types of joinder we cover in the episode Resources: “Listen and Learn” series (https://lawschooltoolbox.com/law-school-toolbox-podcast-substantive-law-topics/#listen-learn) Podcast Episode 218: Listen and Learn – Supplemental Jurisdiction (Civ Pro) (https://lawschooltoolbox.com/podcast-episode-218-listen-and-learn-supplemental-jurisdiction-civ-pro/) Podcast Episode 263: Listen and Learn – Subject Matter Jurisdiction (https://lawschooltoolbox.com/podcast-episode-263-listen-and-learn-subject-matter-jurisdiction/) Podcast Episode 292: Listen and Learn – The Erie Doctrine (Civ Pro) (https://lawschooltoolbox.com/podcast-episode-292-listen-and-learn-the-erie-doctrine-civ-pro/) Bar Exam Toolbox Podcast Episode 145: Listen and Learn – Permissive Joinder and Required Joinder (https://barexamtoolbox.com/podcast-episode-145-listen-and-learn-permissive-joinder-and-required-joinder/) Download the Transcript  (https://lawschooltoolbox.com/episode-321-listen-and-learn-intervention-impleader-and-class-action-lawsuits-civ-pro/) If you enjoy the podcast, we'd love a nice review and/or rating on Apple Podcasts (https://itunes.apple.com/us/podcast/law-school-toolbox-podcast/id1027603976) or your favorite listening app. And feel free to reach out to us directly. You can always reach us via the contact form on the Law School Toolbox website (http://lawschooltoolbox.com/contact). If you're concerned about the bar exam, check out our sister site, the Bar Exam Toolbox (http://barexamtoolbox.com/). You can also sign up for our weekly podcast newsletter (https://lawschooltoolbox.com/get-law-school-podcast-updates/) to make sure you never miss an episode! Thanks for listening! Alison & Lee