Name of a TV Series with the main character's calling card is a "Queen of Herarts" playing card.

The storyline of the series.

An executive of a bank, (I think), is framed and sent to prison for 2 years.

He uses the prison as a school by listening to inmates sent in for various crimes.

With the knowledge he learns in prison he brings the people who framed him to justice.

The series continues with him using these skills to help other people who had similar situations.

He always left a calling card, the "Queen of Hearts" playing card.

Thanks,  Paul