The three-part original miniseries “Tin Man” aired this week on SciFi and the NBC Universal cable network is already celebrating. Nielsen numbers from night one on Sunday showed the program posting the highest ratings ever for SciFi. The wild re-imagining of L. Frank Baum’s “Wonderful Wizard of Oz” claimed a Household rating of 4.2 and 3.93 million households. It delivered more than 6.3 million total viewers 2+, 3.8 million 25-54 and 3.4 million 18-49. Parts 2 and 3 aired Monday and Tuesday in primetime.