To the Rescue
In order to save Jessica, you'll need to guide Mike along all the risky paths and be pretty accurate with the quick time events. Choose to Risk Shortcut, Jump Down, Jump, then Risk Slide Down to complete this section as fast as possible, and as long as you weren't too slack with the button matching then you should reach Jessica before it's too late.
…And Which One Will Die, Part 1
When you have to make a choice with the spinning saw, make sure you save Ashley by moving the lever towards Josh.