User blog comment:Grimmival/Is Hank a Grimm?/@comment-1966944-20120507234023/@comment-1966944-20120511063437

Tom Daniel, the Clinic Manager at the Geir free clinic in Organ Grinder, became pretty nervous when he found out Nick and Hank were investigating the murder of one of their patients and he didn't morph into a Geir. It may be true that they only morph when they are nervous or stressed (this is still speculation) but I'm saying its a convenient plot device for the writers to bypass some of the mythology they wished to establish in the first place.