- 1 Daemon Rising (1)
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The citizens of Mainframe start to battle the supervirus Daemon who has infected 92% of the Net. Bob is horrified to discover that she has infected all the other guardians.
Air Date: 2001-10-19
- 2 Cross Nodes (2)
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The battle against Daemon continues, Hexadecimal turns into a sprite, we learn more of the character's pasts, the nulls form an old friend, and Turbo has been infected by Daemon.
Air Date: 2001-10-10
- 3 What's Love Got To Do With It? (3)
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Daemon continues to infect more and more citizens of Mainframe, we discover more about Bob's past and his first coming to Mainframe, Bob's condition worsens, and Daemon learns about love.
Air Date: 2001-10-26
- 4 Sacrifice (4)
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Daemon finally infects all of Mainframe except for Little Enzo, Hack, Slash, and Frisket, who were in a game cube. Hexadecimal makes the ultimate sacrifice.
Air Date: 2001-11-02
- 5 My Two Bobs (1)
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The two bobs try to figure out which is the original and which is the copy. Dot can't decide which one to choose. A game cube drops placing Matrix, Frisket and Normal Bob into a Pokemon style game.
Air Date: 2001-11-09
- 6 Life's a Glitch (2)
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While most of the gang battle Rocky The Rabid Raccoon in a game, Glitch Bob struggles to find a way to separate himself from glitch, and Dot follows her heart.
Air Date: 2001-11-16
- 7 Null-Bot of the Bride (3)
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Dot prepares for her wedding with Normal Bob, Glitch Bob remains comatose in the super computer, and Glitch finally reveals the identity of the real Bob.
Air Date: 2001-11-23
- 8 Crouching Binome, Hidden Virus (4)
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Megabyte, now able to shift form, rampages through mainframe, but Bob insists his theories on turning a virus good will work.
Air Date: 2001-11-30
- 10 Daemon Rising: The Movie (S04E01-S04E04)
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Looks like Bob and his fellow computer Sprites may have finally met their match. Supervirus Daemon is spreading her infection throughout the entire Net and edging ever closer to the City of Mainframe. Bob joins forces with old enemies in an attempt to foil her destruction of Mainframe and must reach into the past to find the answer.
- 11 My Two Bobs: The Movie (S04E05-S04E08)
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Will the real Bob please step forward? There might not be a virus, but life's still interesting in Mainframe when a second Bob comes on the scene. No one knows which is which - including the two Bobs. With wedding preparations underway, Dot can't decide who to marry and turns to her friends for assistance. Meanwhile, an old enemy returns to the system and only one of the Sprites can save the Mainframe inhabitants.