How I Met Your Mother:
Season: 7 / Episode: 11
The Rebound Girl
Date: November 21, 2011
This Television Episode refers to Ghostbusters
Marshall recalls the last time he left an important decision up to The Universe. When he finds his "sign", he runs in to Ernie Hudson on the street, asking to use his cell phone. Ernie Hudson responds with, "Who you gonna call?". There were several other signs including the old firehouse, the old fire car, and the literal "no" sign.