H. H. Stephenson took three wickets in a row playing for England against Hallam, in 1858. He was given a hat for his performance; this is the first recording of any use of the term "hat trick" or the actual idea of a hat for three consecutive successes.
Dino Ciccarelli in 1981
billy bob joe
If you mean in one playoff year, the record is 19 goals, done twice, by Reggie Leach in 1976 and by Jari Kurri in 1985. The career playoff total is 122 goals by Wayne Gretzky. For complete playoff stats, I suggest you Google " NHL Playoff Records" and consult some of the sites offered.
Wayne Gretzky 1985 Edmonton Oilers 47 points
St. Louis Blues
EDMONTON
5
Gretzky
7
Steven Stamkos
Oilers in '88 went 16-2
36