This is a list of episodes that have an unconfirmed title.
Benson's Past Episode - Nickandmore.com confirmed that an episode featuring Benson's past will be in the third season. This may be Stick Hockey, due to Benson having a flashback. It is probably Think Positive, due to Benson's family being shown.
Skips' Past Episode - Nickandmore.com confirmed that an episode featuring Skips' past will be in season three. This may be "Skips Strikes", due to it being revealed that Skips' real name is Walks, but it may also be "Skips vs. Technology" because Calvin Wong said that this episode would "change Regular Show". It may also be "Fists of Justice". It also might be "Diary", since it explains why Skips skips.
Mordecai and Margaret Episode - Nickandmore.com confirmed that an episode featuring Mordecai and Margaret becoming more than friends would be in season three. This may possibly be "Camping Can Be Cool" because Mordecai and Margaret sit on top of a car together and go on a date. This may have also been "Butt Dial" and "Yes Dude Yes", due to Calvin Wong saying that there would be more than one episode for Mordecai and Margaret. Also, "Access Denied" may be another Mordecai and Margaret episode, as would be "Death Bear". It might also be "Bad Kiss". It might have been "Picking Up Margaret", because they kiss.
Hi Five Ghost's Past- There might be an episode about Hi Five Ghost's past in Season 4 or 5.
Thanksgiving Episode- According to Cartoon Network Upfront 2013, a Thanksgiving Episode has been confirmed. It is set to premiere sometime in November.