- "Now, which one of you is the chief engineer? I ask one more time, and then I start shooting. Who is this ship's chief engineer?"
- ―Dean Haddad
- "I don't like liars."
- ―Dean Haddad
While working for HYDRA undercover within S.H.I.E.L.D., Dean Haddad was stationed on board the S.H.I.E.L.D. Aircraft Carrier Iliad. When HYDRA revealed itself to the world, Agent Haddad betrayed his former S.H.I.E.L.D. colleagues and killed many of them during a firefight, taking the survivors, many of whom were injured and held hostage. He watched the news reports on the Battle at the Triskelion and became annoyed that HYDRA would always be referred to as a Nazi organization.
Later on, he turned to his hostages and demanded to know who the head engineer was or he would begin executing the hostages. When Tim Maguire rose up and claimed it was him, but Alphonso Mackenzie immediately told him that he was in fact the head engineer and Maguire was lying to protect him. Not liking liars, Dean shot Maguire twice in the chest, killing him with no mercy.
Before he could question Mackenzie, a strange device slid into the room. While he was looking at it, Bobbi Morse stormed through the doors and began shooting at the HYDRA Agents. That was when Haddad was fast enough to take Susanna Lauren Sherman hostage, but before he could make his escape, he was killed when Isabelle Hartley threw her knife into the back of his neck.
- Glock 17: Dean Haddad gathered the engineers of the Iliad and held them as hostages during the Battle on the Iliad, threatening them with a Glock 17 to learn the identity of the chief engineer. Tim Maguire stood up as the ship's engineer to protect Alphonso Mackenzie, the actual chief engineer, but when Mackenzie tried to save Maguire's life, Atkins simply shot him and threatened to kill Susanna if Mackenzie did not cooperate.