The Guy, a friend of Bug and a hacker wears a V for Vendetta mask. The director of this episode James McTeigue directed V for Vendetta.
The venue of Riley's gig is a very popular venue in Amsterdam, called Paradiso. It used to be a church before they converted it into a concert hall. Artists like Prince and David Bowie performed there in the early days. The Rolling Stones even had an additional balcony built for their show.
The title is always a line said in the episode. Wolfgang is the one who says, "Fear never fixed anything." He says this in a bar with the 8 as they all decide on a new plan of action.