How were Walton, Frankenstein and the Monster all “imprisoned” in some way throughout Mary Shelley’s Frankenstein.

In Mary Shelley's Frankenstein, each
of the main characters, Walton,Victor Frankenstein, and the creature, is consumed by an
idee fixe.  That is, they are obsessed with one
idea. 

With Walton, it is the exploration of the North Pole
that is his idee fixe. For, it is not until the crew beg him to turn back that he does. 
Still, like Victor, he listens to the creature's poignant tale and lets him
live. 

With Victor Frankenstein, his "vaulting ambition"
and pride that drives him to "play God" and create his own being.  Then, after he
has given life to an aberration, he is repulsed and flees.  After he learns of the death
of his brother William, Victor's ego will not permit his being honest and claiming
responsibility for the deaths of two people.  Instead, he vows to pursue the "monster"
he has created, allowing him to kill more people in his path of revenge against Victor.
Finally, the creature becomes obsessed with avenging himself against Victor after he is
rejected by the DeLaceys.  He blames Victor for giving him life and making him hideous
to others; when Victor reneges on his promise to make a mate, the creature continues in
his obsession by killing Elizabeth on her wedding night when Victor leaves the
room.