Lisa Kudrow on Filming the Emotional Finale of 'The Comeback'

PHOTO: Lisa Kudrow appears on "Good Morning America" Nov. 3, 2014.PlayLou Rocco/ABC
WATCH Lisa Kudrow's 'The Comeback' Making a Comeback on HBO

Spoiler Alert!

Lisa Kudrow's new hit "The Comeback" saw season 2 come to a close on Sunday. In the episode, Kudrow's character reveals the real Valerie Cherish, something the former "Friends" star couldn't help but get caught up in herself.

In fact, Kudrow said she got sick shooting the final scene and had to do it in one take.

"The very end, once that music starts. I thought I'm never going to stop crying, I don't know what I'm ever going to do. It was a release," she told E! News.

In the finale, the former washed-up actress, currently filming a reality show about her comeback to TV, decides to leave the cameras behind and focus on the real her, something Kudrow said she was "nervous" about doing. Valerie goes to the hospital to be with her close friend Mickey instead of staying at the Emmys and focusing on validation for her recent career achievements. The final moments are not show like a reality show, and were without camera crews like the rest of the series.

"I think everyone understood that, yes, because your reality is going to be more beautiful than your reality-show version of your reality. So why doesn't everyone just live their own reality? So I loved that aspect of it," she added. "The simple fact is that when you do love someone, you want to be with them. And when there's a crisis, you can't think about anything else, and it's hard to be wherever you are if you're not with them. And that's what she experienced. I don't know if she was conscious of it but she just knew, ‘I can't go in there because I have to see him, I have to make sure he's OK.' Maybe in her mind it was, ‘I'll come back if he's OK but how can he be OK?' Because she's been trying to cover her terror. Mickey's not well."

Kudrow, 51, also explained how she got sick trying to film that final scene.

"As for shooting it, that final scene in the hospital…Um, something weird happened. That was our last night. I felt ill. And I don't usually somatize things…I think I did. And I got physically sick. And so I had to get out of there," she revealed. "Michael [Patrick King, the creator] was very beautifully understanding. And you know he's like, ‘We'll get through it, we'll get you out of it. I think also on one level your body is just done. It's been a lot and you're just done.' I said ‘no that's not me, I'm not like that. I don't think that's it.'"

She continued, "I had to get out of there and then I definitely got sick in the car."

Valerie ends up winning an Emmy, but it happens when she's at the hospital supporting her friend.

As for a season 3, Kudrow said, "I would love to do more."