That one was Hydra. A mole infiltrated our team, and had been exposed. Even faced with all the evidence, I didn't want to believe it. Tried to talk him into siding with us again. That gave him time to corner us. He locked us in a medpod and sent it to the bottom of the ocean. It was just Jemma and me. We were both injured. I could use the first aid tools to develop a breathing apparatus, but it was only enough to give a single lungful of oxygen.

[He shrugs, unable to clamp down on the words falling into sequence, a train barreling out of its station.]

I wasn't going to be responsible for Jemma's death. So I didn't give her the chance to say no to me. Bit selfish of me, to not be open to debate. I suspect she's still cross about it.