Bobby Troup (Dr. Early) was an accomplished jazz singer and pianist. In this episode he is briefly shown playing the piano and improvises and sings a little tune directed at Dr. Brackett. This is the only time in the series that Bobby Troup's musical talents were put on display. Troup's real-life wife, Julie London, was also an accomplished jazz singer.
This was the only episode of the entire series in which Roy's wife Joanne appeared on camera.
Ron Pinkard, who appears at Dr. Tom Gray in the pilot episode, would star as Dr. Mike Morton for the remainder of the series.
Robert Fuller (Dr. Kelly Brackett) had been close friends with Julie London (Dixie McCall) and Bobby Troup (Dr. Joe Early), long before he co-starred in Emergency!
Dixie lives in Apartment # 16.
While Dr. Brackett is blowing to get the chorloform into the the horn to relax the baby rabbit, there are shots of the little boy pursing his lip and blowing and Joe Early doing the same thing.
Prior to Julie London's marriage to Bobby Troup, she was married from July, 1947 to November, 1953, to this show's creator, Jack Webb.
Although their relationship was platonic on the show, Julie London (Dixie McCall) and Bobby Troup (Dr. Joe Early) were married in real life. Their marriage lasted from December, 1959 until Troup's death in February, 1999.
Johnny: Rescue, hell. All we rescued was a corpse.
Dr. Kelly Brackett: Get outta here, you hosejockey!
This pilot episode is actually a two-hour-long made-for-television movie. This format would return after the sixth season, when six more made-for-television movies were produced in 1978 and 1979 to close out the series.
Station 10's alarm tones are identical to the ones Station 51 used from the second episode on. Station 51's tones are also different.
Engineer Mike Stoker was a real Los Angeles County Firefighter. He was assigned to Station 21 in Lawndale, CA. He retired from the department in 1996 with the rank of Captain.
As Gage and DeSoto are rescuing the man caught under the trencher, the tunnel wall to their left gives way, causing water and rocks to rush down towards them. As the camera pans back to their continued rescue efforts, you can see several of the rocks floating on top of the water, rather than sinking like they should. This indicates the rocks were made of some other substance (foam, for example).
"Station 10" is LA County FD Station 8 in reality. Later episodes refer to it as such and stock footage of "10" from the pilot is used to show Station 8, which is also a part of Battalion 14 in the "Emergency!" universe.
Dr. Early: Well good Doctor, you do recall The Longest Day? A reference to the movie "The Longest Day" a movie about D Day that tells both the Allied and German points of view.
Dr. Brackett's line, "That's what you get for playing the 'Perils of Pauline.'" is a reference to silent film episodic serial in which the main character Pauline evaded attempts on her life week after week.
Joe Early's line, "Tell me about the rabbits, George." is taken from Of Mice and Men. Lennie liked his friend George to tell him about the soft rabbits that he (Lennie)dreams of being able to tend and touch.