is the original serpent satan?
well it depends how seriously you take the greek scriptures particularily revelation and the fact Jesus taught satan as a real being with servants.
Revelation 20:2 (New International Version)
2 He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years.
"In many places in the Hebrew Scriptures, the word sa·tan´ appears without the definite article. Used in this way, it applies in its first appearance to the angel that stood in the road to resist Balaam as he set out with the objective of cursing the Israelites. (Nu 22:22, 32) In other instances it refers to individuals as resisters of other men. (1Sa 29:4; 2Sa 19:21, 22; 1Ki 5:4; 11:14, 23, 25) But it is used with the definite article ha to refer to Satan the Devil, the chief Adversary of God. (Job 1:6, ftn; 2:1-7; Zec 3:1, 2) In the Greek Scriptures the word sa·ta·nas´ applies to Satan the Devil in nearly all of its occurrences and is usually accompanied by the definite article ho."
to be honest the scripture for me that nails it is this one were jesus speaks to the pharisees.
John 8:44 (New International Version)
44 You belong to your father, the devil, and you want to carry out your father's desire. He was a murderer from the beginning, not holding to the truth, for there is no truth in him. When he lies, he speaks his native language, for he is a liar and the father of lies.
This for me confirms Jesus knew satan/devil was the one who was the man slayer from the beginning and john's words in revelation also confirm this viewpoint. I think there can be no other logical reasoning to have on this.
So if you don't think Satan is the original serpent how do you explain it?