|Allies||Jupiter, Pete, his parents|
|Affiliation||The Three Investigators|
|First Appearance||The Secret of Terror Castle.|
|Last Appearance||The Mystery of the Cranky Collector.|
At the start of the series, Bob wore a leg brace and was not always up to strenuous physical activity. He was assigned all the research work. His library work, which was part time, also helped in this. While he lacked the deductive skills of Jupiter, like Pete, he had high analytical ability. He was also very courageous; his courageousness, according to Jupiter, was comparable to that of a lion. His father, a freelance newspaper reporter, also helped in solving cases by giving valuable clues and information.