Melissa’s parents, Donna and Mark Senior, say they have no idea why their daughter moved 2,000 miles away without warning a few months ago. The 26-year-old, who admits she’s been depressed for years, says she’s had “violent urges” to harm her family and left home for their safety.

TELL DR. PHIL YOUR STORY: At your final breaking point?

“One theory of depression is anger turned inward,” says Dr. Phil in Today’s Takeaway.

“The next thing you know, what seems outlandish starts to seem like a new normal.”

WATCH: Man Says He Was ‘In Shock’ To Learn His Sister Has ‘Violent Urges’ Toward Him And Their Parents

The conclusion of this two-part episode airs Tuesday. Check here to find out where you can watch.

TELL DR. PHIL YOUR STORY: Life in crisis?