"You think you can't remember it but you move your body in a certain way or pick up a pan a certain way and suddenly the next 10 lines of dialogue just open up in your brain," he explains.
The success of the first Auckland season has seen the show travel across the country, including a season in Wellington and short tours in Wanaka and Kerikeri. Parker says audience reaction is always the same no matter where they are.
"It's this overwhelming joy and warmth from the crowd because Hudson and Halls were on TV across the nation."
However, one incident shone a spotlight on the conflicting and conservative opinions belonging to some of the theatre-goers. The show ends with the audience being invited on stage for a photo with "Hudson and Halls".
Two women who came forward at the end of one of the Kerikeri shows told Parker and Emerson that their husbands weren't going to join them because "they're homophobic". It was an unfortunate reminder of what Hudson and Halls experienced in their day but for the two actors, it only highlights the importance of touring the show.
"This show is funny and is hilarious but it's also got a really beautiful, political message around that you've got to accept people for more than their face level of camp," Parker explains. "The fact that we kind of try and provoke more of that is the real importance of the show. If it was just slapstick, it wouldn't be as successful as what it is."
"I'd like to think those guys have thought about it a few times since then," Emerson adds. "I don't expect it to change them but we've made them aware of themselves."
While some in the audiences may hold conservative views, that hasn't stopped everyone who has seen Hudson and Halls from enjoying it. Emerson recounts how one night in Wanaka they had to pause on stage as the audience was laughing so hard they couldn't continue.
Given the success of the show and the popularity of the inspiration, it seems likely that it could make its way to screen someday. However, both actors say the live experience gives people a better opportunity to experience who Hudson and Halls were.
"I feel like it would be a shame to waste their story on 90 minutes," Emerson says.
"There's something really beautiful about bringing them into the communities," Parker agrees. "The show is so live; it was made to be live. It's immersive. If they wanted to tell the story without it being our show, it would be something different. TV, you could get an education of the men, but theatre, you get an experience of them."
Lowdown
What: Hudson and Halls
Where & when: Q Theatre, June 27 - July 9.