Detective is related to Professional. Technician is a type of Professional. Technician is a type of Expert. Investigator is a type of Expert. 
Episode is a type of Broadcast. Episode is related to Segment. 
Detective <--RelatedTo--> Professional <--IsA-- Technician --IsA--> Expert <--IsA-- Investigator 
Broadcast <--IsA-- Episode <--RelatedTo--> Segment 