故事发生在神盾局特工第四季开始前不久，主要介绍了具有超高速移动能力的异人族埃琳娜·悠-悠·罗德里格兹。作为一个超能力者，她必须签署索科维亚协议。但是协议的限制会与她迫切想要完成的个人使命产生直接冲突，这将考验她的能力，也包括与S.H.I.E.L.D团队成员的惊险接触。
神盾局特工之弹弓 (季节 1)
Vendetta (集 1) 6.8
编剧: Sharla Oliver
播出日期: 2016-12-13
运行时间: 5 min
概述: Now that Daisy has returned to S.H.I.E.L.D., Yo-Yo wants to talk to her about a secret the two of them share. In a flashback, we start to learn about the day Yo-Yo signed the Sokovia Accords. But we also discover Yo-Yo is tracking a dangerous threat from her past.
John Hancock (集 2) 6.8
编剧: Sharla Oliver
播出日期: 2016-12-13
运行时间: 4 min
概述: Director Mace talks Yo-Yo through the signing of the Sokovia Accords. There are regulations to follow and severe consequences if the agreement is broken. When Yo-Yo feels that bureaucracy is getting in the way of her mission, she’s faced with a difficult choice.
Progress (集 3) 7.1
编剧: George Kitson
播出日期: 2016-12-13
运行时间: 6 min
概述: Yo-Yo is eager to further her personal mission, but must first report to the lab. While Fitz-Simmons complete Yo-Yo’s Inhuman registration, she must find a way to continue her secret agenda, and hide the truth from Mack.
Reunion (集 4) 6.8
编剧: Iden Baghdadchi
播出日期: 2016-12-13
运行时间: 5 min
概述: After Agent May confronts Yo-Yo, Yo-Yo reunites with an old acquaintance and digs up the past.
Deal Breaker (集 5) 6.7
编剧: Iden Baghdadchi
播出日期: 2016-12-13
运行时间: 4 min
概述: Yo-Yo finds herself held captive by Ramon and discovers he has a connection to an old foe of S.H.I.E.L.D. When some unexpected help arrives, Yo-Yo gets her chance to exact vengeance against the man who caused her family pain.
Justicia (集 6) 6.9
编剧: Mark Leitner
播出日期: 2016-12-13
运行时间: 4 min
概述: Yo-Yo continues her personal mission of vengeance and must decide if she will cross the line and take a life in her quest for revenge. In the aftermath of her covert adventure, Yo-Yo weighs her commitment to the S.H.I.E.L.D. team.
