Jennifer Garner improvised during her scene with Rachel Nichols when the women discuss Rachel's meeting a man on her mission. As Nichols didn't know what to expect from her co-star, her blushing is real in the scene.
The producers had to apologize to the government of Tunisia who were upset by the depiction of their country in this episode.
Briton Julian Sark is played by American actor David Anders, who naturally affects an accent for the role. Here, when Sark poses as an American, Anders uses his natural speaking voice.
Rachel Nichols had a wardrobe malfunction during the filming of her sex scene with David Anders when her breast slipped out of her bra. This is not available as an out-take.