Marvel's Daredevil: 41 WTF Moments From Season 2
24. No Heartbeat
After stumbling upon the mysterious hole, it's not long before Daredevil and Elektra are joined by some rather unwelcome company.
Members of the Hand arrive on the scene, which shouldn't pose too much of a threat for two seasoned fighters like this pair, but there is one issue: Matt can't hear their heartbeat.
It's one of the ways he senses an opponents movements and is able to fight them, and while ninjas not making a sound is to be expected, the fact that they've actually managed to silence their heartbeat is on another level.
It comes into play later on in the season as well, as he develops a new skill to hear them. Listening not for their heartbeat, but for the exhale of breath.