On Friday Gren Wells's "The Road Within," a low-key dramedy about affliction adapted from the 2010 German film "Vincent Goes to Sea," opened in New York and Los Angeles. It stars the young, promising Irish actor Robert Sheehan as a teenager stricken with Tourette's, whose cold-hearted father (Robert Patrick of "Terminator 2": Judgment Day") installs him in a mental clinic after his mother dies.