Tremors: As they investigate the death of the suicidal man, Sam is suspended, putting him on a dangerous path of self-destruction. Faced with the sudden loss of so many lives, Ronnie reaches out to his estranged daughter. Meanwhile, Jake gets to know his new sidekick, the feisty Kate Barker. Wes and Ronnie discover the true identity of the culprit, but will they catch him in time?