The snake that came out of the wall was a California Kingsnake that went through the wall. The Kingsnake is non-venomous.
The light fixture on the wall which the snake hides in is not on the wall in any past or future episodes.
The initial title was "Wild Thing," after The Troggs' song, which was named in original airings and printed series lists. From 1995 onward, it was "Wild Kingdom."
BTU stands for "British Thermal Unit;" it is the amount of heat required to raise the temperature of a pound of water by one degree Farenheit.
One of the first times (of MANY!!!) that Tim bangs his head on the pipe in the basement.