The DVD that Owen is watching from Eugene's collection is the "lost" sci fi classic A for Andromeda (1961). Notable for being a very early role for Julie Christie, only one full episode of the series is known to exist.
Filmed concurrently with 1x12 "Captain Jack Harkness". Eve Myles has only a fleeting appearance in that episode as her character plays a very big role in this one.
Y squared = 4AX is the general equation for a parabola.
When the Torchwood team is sitting around the table discussing how to proceed, Captain Jack is holding the bolt gun from Doctor Who, Satan Pit.
In the opening scene, from the god's-eye view at the accident site, when Eugene realizes he is dead, he casts no long shadow as do all the other people standing roadside.