Episode 5.01 - Repilot Jeff returns to Greendale to help his former law partner gather evidence for a lawsuit; thinking Jeff is planning to help save the school, Dean Pelton calls the study group back together.
Episode 5.02 - Introduction to Teaching Professor Hickey helps Jeff settle into his new job at Greendale; Abed convinces the study group to take a class focused on Nicolas Cage.
Edit: And here's another trailer, although it's more of a discussion on what's to come
Season 5 starts tomorrow on NBC with the first two episodes at 8 PM EST. Hopefully I'm not the only one that's excited, so far the reviews have been very good and Season 5 has a metacritic score of 88 from 5 critics that have seen 3 episodes, which is the same as Season 2.
Here that follows is the Titles and synopsis of the first 5 episodes of the season, so obvious spoilers and don't look at them unless you want to be spoiled. + Show Spoiler +
S05, E01 Repilot Jeff returns to Greendale to help his former law partner gather evidence for a lawsuit; thinking Jeff is planning to help save the school, Dean Pelton calls the study group back together. 1/02/2014
S05, E02 Introduction to Teaching Professor Hickey helps Jeff settle into his new job at Greendale; Abed convinces the study group to take a class focused on Nicolas Cage. 1/02/2014
S05, E03 Basic Intergluteal Numismatics Dean Pelton initiates an investigation into an anonymous bandit; Jeff is suspicious when someone makes a confession. 1/09/2014
S05, E04 Cooperative Polygraphy A team of investigators has the study group take lie detector tests before they can be considered for distributions from Pierce's will. 1/16/2014
Geothermal Escapism Abed plans an epic going-away party as Troy prepares to leave Greendale; a fun game transorms into a high-stakes competition. 1/23/2014
Holy shit the season 5 premiere episodes were fantastic. The repilot does a great job of setting up why the group is coming back and was funny, but the second episode can stand up to the best of season 1-3.