A close friend of Frank Hardy, Philip Cohen is very artistic and a genius when it comes to electronics ,in the Casefiles series he often helps out the Hardys when they need a video to be digitally restored or a computer system hacked into. Phil is also skilled at painting and is a great tennis player. In The Mysterious Caravan, book #54 in the original series, it is said that he holds the county tennis championship. Helping the Hardys, Phil has faced quite a bit of danger throughout the series, but no matter what happens, always has a good sense of humour.