Quite entertaining as a detective series. And fun to watch for mathematicians or those who like maths. Still, while the maths holds, its application in relation to the crimes mostly doesn't. It's "mathematical name-dropping".
Also, the computer sciences parts are quite often far off - it seems the (excellent) consultants employed for the series were all pure mathematicians. Take for example the notion, that to delete a hard disk drive, the data bits are repeatedly toggled. That would actually leave the data as is, or easily restorable as its bit-wise complement. Actually, data is overwritten, either with zeroes or - to prevent restoration - alternatingly with zeroes and ones (independent of the original state).
Nevertheless, definitely worth watching.
Also, the computer sciences parts are quite often far off - it seems the (excellent) consultants employed for the series were all pure mathematicians. Take for example the notion, that to delete a hard disk drive, the data bits are repeatedly toggled. That would actually leave the data as is, or easily restorable as its bit-wise complement. Actually, data is overwritten, either with zeroes or - to prevent restoration - alternatingly with zeroes and ones (independent of the original state).
Nevertheless, definitely worth watching.