The Night of the Brain - S2-E21
Continuity mistake: When West and Gordon enter the print shop, they see Mr. Blackhurst's corpse sitting at his desk, with his head up, but when West and Gordon approach Blackhurst, his head is now noticeably bowed forward.
The Night of the Brain - S2-E21
Continuity mistake: West is lying down while in hand shackles. When Voulee turns her back to him, he releases a gadget from under his sleeve by his right wrist. While the camera closes in and out of the device to free him, West's shirt sleeve by his wrist keeps appearing and disappearing. (00:38:35)
The Night of the Brain - S2-E21
Continuity mistake: The opening of the last scene is of the personal train car in the dark night with very little moonlight. The closing scene of this episode shows the train again amid the night sky which is a much lighter beautiful blue. (00:47:45 - 00:49:15)
The Night of the Brain - S2-E21
Continuity mistake: The arms of the West chess piece are at different positions each time the piece is shown. (00:00:05 - 00:07:45)
The Night of the Brain - S2-E21
Continuity mistake: When Braine fires one of his mini-rockets at West, West falls at an angle in front of the bureau's left side. The next shot of the fallen West has him on the bureau's right side, perpendicular to it. (00:20:50)