They split up over creative differences.

You can do it, Hana. I know. Where's the dead drop? After Einstein? There was an alien race called the Greys… Yeah, baby! I'm never gonna die! You're not gonna tell me. I've been trying to do that my whole lif… Lucky girl. Oh, shit! Only one survived. You're a married man, huh? We need to get you home. Elena, we need a status report.