Season 3, Episode 14 - Season 3: Episode 14 (Watch Your Back, Mack) Original air date: 4/2/13. The arrival of a new dancer at the Abby Lee Dance Company has Melissa and Mackenzie on guard. Abby, still hurting over the loss of her dog Broadway Baby, visits a taxidermist. Meanwhile, Cathy hires a good friend of Abby's to choreograph the dance for this week's competition. Check out "Dance Moms" photos and extras!