At the beginning of the episode, when Clark travels from London to Metropolis, the descending aerial shot of Metropolis is of Vancouver BC where "Smallville" is shot.
This is the first time Clark uses his micro vision to magnify an object; the dots on the deceased's body while speaking to the Medical Examiner. Though he had used telescopic/microscopic vision along with his X-ray-vision before, this is possibly the first time he used it without x-raying, and also the first time a special effect is seen in his eyes when using this power.
Clark dons on the classic black glasses as well as taking on the clumsy and mild mannered reporter persona so that he'll be ready hiding in plain sight to be the hero that people need.
Desaad mentions to Clark that he's now incorruptible because he has more love in his heart (thanks to Lois) which has enabled him to be more self-assured. Maxima mentioned to Clark that his attraction for Lois allowed him to break free from her control in Season Eight's "Instinct".
The hood and sunglasses Lois tries to add on the costume closely resemble the fake Blur costume Oliver wore in "Identity".