When DiNozzo says "Nesia tova" to Ziva, it means "have a good trip" in Hebrew.
When DiNozzo comes into Abby's lab, he says "Oh, hi, Abby-Normal." This is a reference to Igor's answer when asked whose brain it belongs to in "Young Frankenstein" (1974).
This is the first episode where a brown/beige cloth is used to cover a body's "private parts" in the morgue. Previously, they used really bright lights or strategically-placed trays to hide them.