In a guardhouse jail on the military grounds, the apes had discarded their spacesuits and changed into their normal clothing.Dr.Challis was suspicious of business-suited guards standing around the facility: "They look an awful lot like the man who killed your father.Delighted with her arrival, he called for his wife Cora (Dorothy Cumming), a tough pioneer woman, o welcome his cousin ("Cora! Letty""s come!"), but she was less than thrilled to greet Letty, as she was tending to the hree young children.A struggle ensued in the Main Control Room when Billy Rosewood arrived, and stray gunfire accidentally activated some of the park""s rides.