...after he starred in Emergency! that they stopped offering him acting roles for a period of time

https://www.metv.com/stories/people-were-so-convinced-that-robert-mantooth-was-a-paramedic-after-he-starred-in-emergency-that-they-stopped-offering-him-acting-roles-for-a-period-of-time

One producer who denied Mantooth said that they wanted "a real actor."