Race To The Edge: Shell Shocked Part 1

In this episode Hiccup and Astrid share their second kiss as a couple!

Astrid congratulates Hiccup for creating the perfect plan to capture and defeat Viggo. Hiccup is still nervous and unsure, but Astrid assures him that the plan will work. They attempt to share a kiss but are interrupted by Fishlegs. Fishlegs believes they're thinking of ways to hide the Dragon Eye once regaining it, completely oblivious of their romance.

Hiccup and Astrid are relieved and decide for the time being to keep their newly formed romantic relationship a secret from the rest of the Dragon Riders. Hiccup puts his hand out for a handshake but Astrid grabs it and pulls Hiccup to her and the two share a kiss. After the kiss as Astrid gets ready to leave, she says to Hiccup, "Did you really seriously think I would leave here with just a handshake?" Right after Astrid leaves, Hiccup tells Toothless that Astrid is really something else.

Then, during Ryker's most recent attack, Astrid, fearing for Hiccup's safety, calls out to him to suggest that he should go back because he was nearly killed, but he, in front of the other team members, openly rejects that idea since they had already discussed not letting things alter their behavior no matter what else was going on, potentially exposing their relationship. Later, as Hiccup and Astrid discuss strategies that revolve around the threat that Ryker now poses, they apologize to one other for giving in to their feelings about the other's safety and vow not to let it happen again. Hiccup says that they need to put their personal feelings aside and accept the risks, and that they can only protect one another up to a point, just as they have been doing for years, and Astrid agrees. Hiccup then teasingly says "It is nice to know you care, though.", to which Astrid playfully replies "If you dont know that by now, then ...", at which point they very deliberately lean in towards each other for an embrace and a romantic kiss, but are suddenly interrupted by Tuffnut and Ruffnut, which embarresses them and stops their romantic interlude in its tracks.

Eventually, the rest of the Dragon Riders begin to notice a change in Astrid and Hiccup, but are oblivious of their newly developed romantic relationship and instead theorize different reasons for their behavior.

While Ruffnut and Tuffnut believe that Hiccup is going to die and Snotlout believes he has developed a gambling problem, only Heather becomes aware of their romance and allows the couple to have time alone together.