Charlotte Ross, who plays Donna Smoak, will be appearing in Arrow season 4 for multiple episodes.

We previously reported that Ross would appear in Arrow season 4, episode 6. Now TVLine is reporting that Ross will also appear in Arrow season 4, episodes 9 and 10. It’s worth noting that episode 9 is usually the mid-season finale for Arrow, while episode 10 is usually the mid-season premiere. This likely means her appearance will involve a pretty major development.

Though specific details about her appearance are currently being kept under wraps, we’re hoping her multiple appearances will be related to the popular fan theory that season 4’s Big Bad, Damien Darhk, is actually Felicity’s father.

Related: Arrow season 4 premiere synopsis, stills reunite Team Arrow (updated)

The last time we saw Donna Smoak, she was pushing Felicity to pursue her feelings for Oliver, despite her daughter being in a relationship with Ray Palmer at the time.

Additionally, a new trailer aired after the Vixen finale on CW Seed. Check out that new trailer below:

The trailer begins with Captain Lance telling Oliver that the craziness began when he first put the hood on, and how he has inspired other crazies — cue a shot of Damien Darhk.

“This city should never descend into hopelessness,” Oliver declares. “I am declaring my intention to fight for this city!”

Related: Arrow season 4 trailer features Oliver’s return to Star(ling) City (updated)

We also see shots of our main characters suited up as well as Damien Darhk threatening the leaders of Star City. “I suggest you say goodbye,” he says.

Arrow season 4 premieres Wednesday, October 7 at 8:00 p.m. ET on The CW.

Are you looking forward to ‘Arrow’ season 4?