Begin with the complete series name
Law & Order, Special Victims Unit and Criminal Intent each restart their own season numbering. A search for only S2E4 can never tell you which one you mean. Search the full series name, open its detail page and then use its episode guide.
Use a second identifying detail
Compare the episode title or original air date when two services number specials differently. An episode may be part of a crossover without belonging to the same series as the previous chapter. The PressPlay guide lists regular recorded seasons; it is not a promise that every regional viewing service uses identical menus.
Mark what you finished
Save a checkpoint for the last episode you completed, not the one you intend to start. The next time you return, that record gives you a clear starting point. You can change it after a rewatch, clear it when starting again or include it in a My List backup.