THE STAIRCASE
Sundance, 10:00 p.m. ET
MINISERIES CONCLUSION: Last week’s installment, the first of two new hours updating the story of convicted murderer Michael Peterson, cast a persuasive amount of suspicion on the one lab scientist whose testimony was most responsible for the jury’s verdict of guilty. Tonight’s continuation of that update shows the results, if any, of that new information. If you’ve seen any of The Staircase, this last step is not to be missed.