Marvel's Agents Of S.H.I.E.L.D. has now reached its thirteenth episode with "T.R.A.C.K.S." The "T.R.A.C.K.S." episode followed two Marvel movie traditions. First, the episode offered up an appearance by Marvel legend Stan Lee. Second, the episode provided a special teaser at the end. Agents Of S.H.I.EL.D. Episode 13 "T.R.A.C.K.S." just finished airing for East Coast viewers. If you haven't watched the episode yet, then be warned that spoilers follow for the bonus scene. If you just can't wait or have seen the episode, then keep reading because we will be covering exactly what happened. Mike Peterson is standing in the woods, watching some kids playing on a playground. He pulls a notepad and a pencil out of his pocket. He writes on the notepad, "Can I see my son?" He waits for a second, and the message comes back on his eye screen, "Not yet." Peterson is disappointed, but he continues to watch the kids playing. The camera focuses in on Peterson's cybernetic leg on a Cybertek label that reads "Project: Deathlok."