The room where Fives and Shaak Ti go before Chancellor Palpatine appears to be the same room that Anakin was turned into Darth Vader.
When the probe droid is spying on Fives, the larger Aurebesh lettering in the center of its view-screen translates to "Subject Identified" and the smaller text on the left reads "Subject Clone Trooper call sign Fives class Arc Trooper."
The 'Jedi fortune cookie' message that opens the show reads "The popular belief isn't always the correct one."
In the clone bar, one of the clones can be heard toasting to the 212th. The 212th Battalion is Obi-Wan Kenobi's battalion.