 So, it was impossible for her to continue, although she did finish the first half of a full season before having an operation which resulted in the loss of her sight in that eye.At that time, only 12 episodes had been filmed so, in order to complete the first 13-episode cycle, the pilot was dusted off and finally shown as the last show of the series on December 11, 1971.CBS announced that the series would return the following fall, thereby giving Duncan time to recover from her surgery, but also providing the network time to retool the program.