Plus, get a sneak peak at the fiery crisis at the call center.

May Grant is in danger.

She has to go into fight mode," she says.

9-1-1 stories May Day

Corinne Massiah and Angela Bassett on ‘9-1-1’.FOX

Not only was the episode a challenge for May, but also for Corinne.

“This episode just felt different to me,” she shares.

“He walked me through everything because it was intimidating and scary at first.

I always felt comfortable on set,” she shares.

Krause also made sure college student Massiah was okay on set and in the classroom.

“We had some overnight shoots, and [Peter] would confirm I was okay.

“[Peter] is literally Bobby in real life.

May’s journey has been one of the most significant evolutions on9-1-1.

Athena fought to save her daughter’s life when the series began after a suicide attempt.

Corinne remembers being nervous when she learned May would become a 911 operator.

911 operator Claudette presents a new challenge for May at work.

While Corinne has enjoyed working with Williams, May has learned some hard lessons from Claudette.

“I got to let my emotions loose and test my ability as an actor.

9-1-1airs Mondays at 8 pm ET on FOX.