"The Spiderwick Chronicles" begins with a journey halfway ... but the easy-going twin's new friendship with Calliope (Alyvia Alyn Lind), Dr. Brauer's daughter, causes a split between the brothers.

Sadly, that key element went woefully underused in The Roku Channel’s TV series adaptation of The Spiderwick Chronicles novels by Holly Black and Tony DiTerlizzi, which seems more interested in ...