Final answer:
In the show The Office, Dwight Schrute suspects Ryan Howard as a potential drug mule in the episode 'Drug Testing.'
Step-by-step explanation:
In S2E20 "Drug Testing" of the television show The Office, the character Dwight Schrute, who conducts an investigation in the office to find out who brought drugs into the workplace, considers the temp Ryan Howard as a potential drug mule.
Dwight's suspicion is mainly due to Ryan's generally quiet demeanor and his internship status, making Ryan an easy target for Dwight's overzealous nature and detective-like scrutiny.