Charley Bombay - now spelled 'Charlie' returns in McGarrett Is Missing (1975), when he is played by Charles Cioffi.
When Charley calls the hotel to verify Joyce's claim by checking her phone charges, the operator tells him that she had made a four minute phone call to New Jersey for a charge of $12.80. This would be equivalent to $82.29 after adjusting for inflation - for a four minute long distance phone call.
Charlie Bombay's ride is a turquoise 1962 Cadallic.