Let me bet, they stare at each other to express feelings, very very often as a way of stretching the duration of scenes?
They'd also do the usual plot device of splitting up and wandering around alone, for the sole purpose of getting into a fix so everyone else can rescue them.
Although sabre tooth tigers and dire wolves regularly eat the red shirts, the rest never think of arming themselves.
I watched the show out of incredulousness. And because I enjoy snarking on bad shows :-)