We're hearing Theta Protocol in Marvel's Agents of S.H.I.E.L.D. TV series for some time (Coulson was hiding it from the team). In the last episode S02E19 of the TV series, this conversation happened regarding Theta Protocol:

Maria Hill: Last Thing. Theta Protocol. Is it ready?
Coulson: Yes, it is. Time to bring in the Avengers.

What exactly is Theta Protocol? This clearly sets up the events of Avengers: Age of Ultron movie (which I have already watched), but I am unable to find a picture of Theta Protocol in the movie.

  • 5
    Since this question is about something that literally happened in the last 30 seconds of the most recent episode of an ongoing TV show, this clearly falls under our "future works" policy and should be closed until the answer appears on-screen; otherwise it's just inviting speculation.
    – KutuluMike
    Apr 30, 2015 at 11:14
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    Just because this hasn't been answered in the show doesn't make it off topic. The OP could have very well thought, like I did, that maybe Theta Protocol was a reference to some other Marvel canon. Also, given the way the last 10 minutes of the show set up the beginning of Ultron, I'd say that we have our answer, if not directly told what it was.
    – PiousVenom
    Apr 30, 2015 at 13:50
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    This was actually answered in Age of Ultron, but will likely take some explaining to connect the dots.
    – Omegacron
    Apr 30, 2015 at 14:14
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    @MichaelEdenfield: As I stated, and Omegacron stated, I believe we have our answer, it just wasn't spelled out for us. Theta Protocol was something to deal with the Avengers. The last episode of AoS was a direct lead into the movie. Also, as I'd stated, for myself who's never read the comics, Theta Protocol could very well have a meaning in the comics. No one has come forth with a definitive "It doesn't exist in the comics". Thus it is a candidate for reopening. It for sure shouldn't be downvoted like it has been.
    – PiousVenom
    May 1, 2015 at 4:03
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    Age of Ultron was originally scheduled to be released on the Memorial Day weekend in the US (May 25th 2015,) and Agents of SHIELD episodes were scheduled accordingly - i.e. the season finale (to be broadcast on May 12th) was supposed to air first, setting up the Avengers 2 movie. For whatever reason, the release of "Ultron" was pushed up to May 1st, but the TV show air dates couldn't be changed. So now the show looks to be "behind" by 2 episodes.
    – Chahk
    May 4, 2015 at 13:13

2 Answers 2


Based on last night's Agents of SHIELD, it appears that Theta Protocol had to do with the Helicarrier that was being stored in an unknown SHIELD base. One of the Koenig brothers was running the base for Coulson and Fury.

So I would assume by saying that Theta was ready, Coulson was informing Fury that the carrier was ready to be put into play if necessary.


After the episode Scars (S02E20), we can definitively say that Theta Protocol was the restoration of the Helicarrier. It was kept a secret in case any other HYDRA agents were still active within SHIELD.

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