McLeod's Daughters - Season 1 Episode 20
Lover Come Back

Tess is obsessed with her new psychology theory - the three levels of why. Armed with one of her mothers old psychology textbooks she figures if she can real reason for peoples actions, then everything will be sorted. But all the psychology in the world cant explain why Alex isnt as romantic as she would like him to be, why Becky and Jodi are at each others throats, or why Loverboy - the bull Claire sells to Nick - keeps breaking out of Nicks yards and returning to Drovers Run.