I used to have the original Michael Larson episodes of Press Your Luck on VHS.
But here's a documentary about how he figured out the patterns and beat the Whammy:
Part 1 of 11. Watch all 11 parts:
Step in the Arena
6340 SE Foster Road Portland, OR 97206
Saturday and Sunday from 11 am to 7 pm
Tuesday and Wednesday from 1 to 7 pm
Thursday and Friday from 1 to 5 pm