I'm stuck on Chapter 6 of Episode 2 in Lego Star Wars the Complete Saga. I have brought Count Dooku down to 4 hearts but cannot figure out how to harm him after that. I have tried many things, but none seem to work. It would be awesome if anyone could help.
The trick is, to wait until he zaps you with Force Lightning. Then, switch to your other character and attack (the Jedi Slam works well here).
Here's a video demonstrating how this is done (fast-fowrard to the 04:30 mark).
And I apologize for how annoying the audio is. I recommend muting.