Greg responds...

Geo-Force - Brandon had worked with Troy Baker before and knew he was a good candidate to play Geo-Force/Brion Markov. We did have him audition (against no competition) just to confirm he could do the Eastern European accent without it sliding into Boris Badenov territory. He could. So we cast him. And he's been great as Brion and other characters ever since.

Terra - We held auditions for Terra/Tara Markov, and Tara Strong just nailed it.

Halo - I knew I wanted to cast Zehra Fazal as Halo / Violet Harper / Gabrielle Daou, and basically wrote the part with her in mind. Brandon and Jamie and I went to see her in a stage play, where she played multiple roles, so that they could confirm just how great and versatile she was.

Forager - With Wally West largely out of the picture, we knew we wanted to find something else to keep Jason Spisak in our cast. Brandon thought Forager would be a good bet and talked about the character with Jason, who loved the idea. We hired him without any try-out, and he was instantly great.

Cyborg - We held auditions for Victor Stone/Cyborg under the false flag of a pretend show with a fake character name. Zeno Robinson was our clear favorite for the role. We brought him in for a callback (with no competition), mostly to see if he had the versatility to play any other roles (such as Steel). We decided then and there that he was our Vic, and seeing Brandon and I in the Control Room, he had already begun to suspect whom he might be playing. We told him he had the role and confirmed he was playing Cyborg, and he practically BURST right in front of us. It was great fun.

Darkseid - We had already discussed a number of potential people to find YJ's version of Darkseid, when Brandon remembered Michael Leon Wooley's performance of the character from Batman: The Brave and the Bold. Jamie and I listened, and immediately Michael had the job.

Vandal Savage - We held auditions to see who could do the best job performing in the giant shoes that the late, great Miguel Ferrer had left behind. David Kaye was the clear favorite.

Beast Boy - When it became clear that Logan Grove was not going to be available to us, we talked with Jamie about who might be able to take his place. After we described the character's journey in Season Three, Jamie suggested Greg Cipes, knowing that we might not go for it, but feeling like Greg'd be perfect for the part. I'd worked with Greg on W.I.T.C.H. and agreed, but our upper management had been pretty adamant about us not using Titans' lead actors to play the same roles they had played on Titans. (Other Titans' actors were kiboshed for certain parts for that reason.) It was something Brandon and I initially agreed with way back in Season One, but by this time, we felt YJ had established itself as its own thing, and we were less afraid of comparisons. And for whatever reason, TPTB were fine with us casting Greg as Beast Boy.