ABC's Agents of SHIELD is bringing in another character from the comics.

Friday Night Lights favorite and comic book fan Adrianne Palicki has been tapped to guest-star as Marvel superspy Bobbi Morse, The Hollywood Reporter has learned.

Best known to comics fans as Mockingbird, Palicki's character will appear in the fifth episode of the Marvel procedural with the potential to return; the episode will find her popping in perhaps not as an ally to Coulson (Clark Gregg) and his team.

The arrival of Mockingbird was first teased in July at Comic-Con when Patton Oswalt — who plays Billy Koenig and Sam Koenig — confirmed that Life Model Decoys exist in the SHIELD universe and suggested that Morse's character could appear in season two (watch the video below).

Palicki joins a rapidly growing roster of guest stars heading to Agents of SHIELD's second run. She joins Kyle MacLachlan as Skye's (Chloe Bennet) father; Lucy Lawless as SHIELD veteran Isabelle Hartly; Reed Diamond as Hydra villain Daniel Whitehall (aka Kraken); Nick Blood as a mercenary Coulson reaches out to for help; Henry Simmons as agent Alphonso "Mac" Mackenzie; and Simon Kassianides as Bakshi.

For Palicki, the casting comes after she reteamed with FNL creator Jason Katims on NBC's About a Boy, playing a love interest for David Walton's Will. She will return to reprise the role in season two of the NBC comedy. Her credits also include G.I. Joe: Retaliation, Legion and Robot Chicken. She's repped by WME and Anonymous Content.

Agents of SHIELD marks the actress' latest foray into the comic book world. She famously played Wonder Woman for DC in NBC's David E. Kelley pilot and Nadia in the WB pilot Aquaman. She next stars opposite Keanu Reeves in Summit's John Wick, due in October, and indie film Baby, Baby, Baby, and will reprise her role in G.I. Joe 3.

Agents of SHIELD returns Sept. 23 at 9 p.m. on ABC.

Email: Lesley.Goldberg@THR.com

Twitter: @Snoodit