The scientist says the sector Chloe breaks into is sector 1978, 1978 is the year the first Christopher Reeve Superman movie was released.
For the first time, Jonathan does not appear in an episode.
Lionel states that he conspired to kill his parents in order to collect the money from the life insurance. In "Shattered", Morgan Edge explains that the deal was to split the money from the property insurance with the slumlord. Both versions could be true if Lionel took out a life insurance policy on his father and didn't tell Edge or the slumlord about it.
Chloe is driving her father's Ford Thunderbird in this episode rather than her own Volkswagen Beetle. This is not explained in the plot, but it is most likely because four Thunderbirds were wrecked while shooting the episode, and it would be significantly more costly to wreck four late-model Beetles.
The secret project that created the truth gas that Chloe inhales is called Levitas which is latin for lightness. It should be called Veritas, latin for truth.