For the first few projects ofJames Gunnand Peter Safransnew DC universe, the primary connective tissue isFrank Grillo.

Creature Commandosviewers have already seen Grillo make his debut as Rick Flag Sr. on the adult animated series.

Grillo will reprise the role in live action for season 2 ofPeacemakerandGunnsSupermanmovie, both due in 2025.

Frank Grillo and his animated character Rick Flag, Sr

Frank Grillo and his ‘Creature Commandos’ character Rick Flag, Sr.Credit:Jon Kopaloff/GA/The Hollywood Reporter via Getty; Courtesy of Max

WithCreature CommandosandPeacemaker, Flag is a prominent figure in the stories.

WithSuperman, he kind of just drops in, Grillo clarifies toEntertainment Weekly.

But the adult animated series has helped him lay the groundwork for the characters future.

Princess Ilana, Rick Flag Sr.

Princess Ilana (Maria Bakalova) and Rick Flag, Sr (Frank Grillo) on ‘Creature Commandos’.Courtesy of Max

I used that stuff as a template when doing the live action.

I think thats important.

Thats what James is great at, creating these vulnerabilities in otherwise impenetrable superheroes.

Frankenstein, Rick Flag Sr.

Eric Frankenstein (David Harbour) and Rick Flag, Sr (Frank Grillo) on ‘Creature Commandos’.Courtesy of Max

I think all of us are monsters inside, Grillo says.

We have sides of us that are ugly to look at sometimes.

Flags a dark guy, and I think that’s why he can relate to these creatures.

Other than that, it was just me alone.

Feel free to blameTaylor Sheridan!

I had to just use what I had and venture to make it as interesting as I could.

I had every intention of dying it white and slicing it up, but I just couldnt do it.

They’re very different, he says.

Its so much more personal and I really enjoy it better.

New episodes ofCreature Commandosstream Thursdays on Max, until the finale on Jan. 9.