When the gang finds themselves trapped in the apartment without power during a Christmas Eve blizzard they reminisce on how they all first met and Adam and Corri's complicated relationship takes an eventful turn. Meanwhile, a deranged serial killer named "the Christine Cringle Tingler" escapes from Framingham Women's State Penitentiary and is on the loose. An hour-long very special episode of Holliston. (thetvdb.com)