The blood on Paul's face from Mellie's suicide is not as much as when he runs into Boyd later on in the hallway.
At the beginning of the episode, the woman inserts needles connected to wires through the sheet of plastic covering Echo, yet when they believe she has expired, they remove the plastic sheet and the needles and wires are still on Echo's head.
When Langton and Echo go through logs (@time 21:17) and find the IP-address of the system-attacker, all shown addresses are IPv4. This standard only allows 4 sets of dot-separated numbers between 0 and 255, so all shown addresses are not actually possible. The IP of the attacker (146.143.317.286; in fiction a Rossum-server) actually begins with an IPv4-range (146.143) belonging to the Deutsches Forschungs Netz (DFN) in Germany.
Victor asks Echo if her headaches started before her 3 week absence from the Dollhouse, though in the previous episode the on-screen text said "3 Months Later" between her escaping and rescuing Galana from prison.
The so-called GPS strip/tag removed from Perrin and Echo is in reality a packaging strip for SMDs (Surface Mounted Devices, which are basically miniaturized electronic components). Identifiable as a dark tinted strip of anti-static plastic, with a row of bubbles containing the SMD's on one side and a row of holes down the other, it's made for easy dispensing by robotic manufacturing equipment.
The Washington Dolls are letter-codenamed after Greek gods (Aphrodite, Hades).
The identifiable and legible notes Echo wrote inside of her sleeping Pod to herself are:
the Attic is Bad
where is Caroline
i was trained to kill
my son killed me
i'm a believer
i have a right to survive
my husband bought me a house
I love my baby
the baby isn't mine
I like pain
women are whores
i tried to make shape
i am nobody
friends help each other
i was blind
shoulder to the wheel
ghosts aren't ---
mountains are safe
Topher makes me ---
Dominic was bad
November is ---
Victor loves Sierra
Sierra loves Victor
Sierra's real name is Priya Tsetsang.
It is revealed that Alpha's original name is Carl William Craft and that he was serving time in prison before becoming an Active.
Alpha uses the phrase "Falling now" when he jumps down while breaking into the dollhouse with Ballard. In another Joss Whedon series, Buffy the Vampire Slayer, during the episode
"Primeval," while Willow and Buffy are repelling into the Initiative (another secret organization), they stop to talk and hug to make up for an argument they had been having. While hugging they begin to slide down their ropes and Willow says "Falling now."
When Sierra first arrives at the NSA building, a guard scans her stolen card revealing the name "A. Saito". Later, Sierra enters the office of the woman she is impersonating,and the door is clearly labeled "Ms. Sato". Shortly thereafter a guard addresses her and it sounds as if he says "Ms. Sato".
Victor's tie was green in the Dollhouse garage but, later in the van until he was fencing with DeWitt it was purple.
When Topher meets Clive Ambrose, he greets him by saying, "Third richest man in the country; nominated for a Nobel Prize..." According to Nobelprize.org, the names of the nominees cannot be revealed until 50 years later, so the only way that Topher would know this is through the Dollhouse's network of influential clients and other clandestine sources of information.
We learn that Echo's real name is Caroline Farrell when a college professor recognizes her.
The motorcycle that Echo rides in this episode is a Ducati 1098.
Mellie's Dollhouse name is revealed to be "November."
When Agent Ballard first confronts Echo and Joel the reflection of a camera man is clearly visible in the front of the oven.
When ATF have surrounded the compound, they incorrectly identify themselves as "Bureau of Alcohol, Tobacco and Firearms". Since 2002, the full name of the organization has been "Bureau of Alcohol, Tobacco, Firearms and Explosives."
Just before Langton talks to the store owner, a white school bus is parked outside the store, yet from inside the store there is no bus visible through the window.
When Olivia is in her office and reaches for the bottle of Johnnie Walker Red Label, she uncorks it then pours a drink. The problem is that Johnnie Walker Red Label is the least expensive of all the company's brands; it doesn't come with a cork, it always comes with a screw top to keep the cost low.