With the show being filmed in and around Harford County, Wittmer explained she preferred to use "all Baltimore people" – or Baltimore-area, as the case may be.
"It's a wonderful turnout," Wittmer said, also beaming about Bel Air. "It's such a wonderful town; I'm glad we came here."
Heidenreich had helped set up the event, and was providing water for those who had to wait in the heat.
She said the town was eager to help Central Casting any way they could.
"They are looking for about 300 people, so I wanted to get at least 500," Heidenreich said. "We are trying to accommodate what they need, and the county's worked really hard to get this production here."
"We tried to get the word out as much as we could. We did want to see a good turnout," she continued, adding the crowd was "pretty tame," without incidents or problems.
Those who came seemed to be from all walks of life and have a range of acting experience. They were processed fairly quickly, with those who did not bring a headshot allowed to get a picture, and being asked if they could return Thursday for the next step.
Some people, like Zach Gaus of Reading, Pa., had already been on screen.
Gaus said he has mostly acted in independent movies, but also portrayed Bob Dylan in "Men In Black 3." He said he just finished the lead role in an independent film called "I Give Up."
"I am an actor, so I have done all this before," Gaus said, smiling. "You never know what happens with these things."