Veronica's Ex, Nick St. Clair, Pops Up in 'Riverdale' Tonight & Archie Doesn't Trust Him One Bit

Graham Phillips makes his debut as Nick St. Clair tonight on Riverdale — and we’re more than a little nervous.

Per KJ Apa, who plays Archie, he’s “stirring the pot”

“Obviously, [with him] being Veronica’s ex-boyfriend, things can get gnarly, especially because Archie’s very protective of Veronica,” KJ shared with TVLine.

Elsewhere in the episode, Alice (Madchen Amick) publishes a fiery piece in the Riverdale Register blasting the Southside and Jughead (Cole Sprouse) is forced to take matters into his own hands to try and keep the peace.

Then, Betty (Lili Reinhart) turns to Archie for help after receiving an ultimatum that could potentially destroy some of her closest relationships.

Riverdale airs TONIGHT @8PM ET/PT on The CW.