The Doctor is in -- for "Thor: Ragnarok," it seems.

In "Doctor Strange's" mid-credits scene, Benedict Cumberbatch's Sorcerer Supreme invites the one and only Thor (Chris Hemsworth) into the parlor of his Sanctum Sanctorum. There, Strange tries to explain why Loki's presence poses a threat to the safety of New York. After all, it's the job of the Master of the Mystic to defend the city against magical perils, and Loki did usher in an alien invasion the last time he was in the Big Apple.

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Thor quickly explains he and his brother are simply searching for the missing Odin, and they will return to Asgard as soon as they find him. Strange responds that they better go find him, in order to expedite Loki's departure. As such, it appears as if Strange may join the god of thunder in 2017's "Thor: Ragnarok."

Although Thor's meeting with the Sorcerer Supreme isn't too much of a surprise, as a photo leaked in August from the "Ragnarok" set suggesting he was searching for the Sanctum Sanctorum -- however, his inclusion in "Doctor Strange" certainly is. The encounter certainly bears the signature humor of "Thor: Ragnarok" director Taika Waititi, which may indicate he had a hand in the scene.

For instance, when Strange asks whether Thor would like some tea, the thunder god replies he usually likes something with that a little stronger. With that, the tea cup is replaced in his hand by a beer stein.

The film concludes with a black screen that reads, "Doctor Strange will return." Fans following the Marvel Cinematic Universe won't be too surprised by that news, as Strange has been confirmed for "Avengers: Infinity War." However, this mid-credits sequence is the first real indication that he will be part of "Thor: Ragnarok."

Directed by Scott Derrickson, "Doctor Strange" also stars Chiwetel Ejiofor, Rachel McAdams, Benedict Wong, Michael Stuhlbarg, Benjamin Bratt, Scott Adkins, Mads Mikkelsen and Tilda Swinton.