Because of the way in which the roles have been written and cast, the characters aren't always easy to identify.

Her agent thought the role had already been cast, but she urged him to check, and he found out that it was still open.

But the other key roles are also strongly cast.

The supporting roles are all well cast, the script is good and the physical production first rate.

This role could have been cast months ago, and I'd still be here today.

Other roles were cast through connections to the three.

On February 15, 2012 the series' first role was cast.

Both men called the actors back as many as two or three times before each role was cast.

After the collapse of the Soviet Union, however, the base's role was cast into doubt.

Four days before principal photography began the role of the Mechanic was still not cast.