| Season Episode: 4x01 |
| Episode: 64 |
| Production Number: |
| Original Air Date: 2007-09-07 |
| Title: Chuy, Jack & Carmine |
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| Season Episode: 4x08 |
| Episode: 71 |
| Production Number: |
| Original Air Date: 2007-11-02 |
| Title: Gus, Abbey and Vinnie |
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| Season Episode: 4x10 |
| Episode: 73 |
| Production Number: |
| Original Air Date: 2007-12-23 |
| Title: ATF K-9 Gavin |
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| Season Episode: 4x11 |
| Episode: 74 |
| Production Number: |
| Original Air Date: 2007-01-04 |
| Title: Troy and Roxy |
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| Season Episode: 4x13 |
| Episode: 76 |
| Production Number: |
| Original Air Date: 2008-01-18 |
| Title: Cody, Chloe and Buffy |
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| Season Episode: 4x14 |
| Episode: 77 |
| Production Number: |
| Original Air Date: 2008-03-14 |
| Title: Curly and Baxter |
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| Season Episode: 4x15 |
| Episode: 78 |
| Production Number: |
| Original Air Date: 2008-03-21 |
| Title: Owen, Jerry and Rocky |
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| Season Episode: 4x16 |
| Episode: 79 |
| Production Number: |
| Original Air Date: 2008-03-28 |
| Title: Marley and Piper |
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| Season Episode: 4x17 |
| Episode: 80 |
| Production Number: |
| Original Air Date: 2008-03-30 |
| Title: Lives Changed |
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| Season Episode: 4x19 |
| Episode: 82 |
| Production Number: |
| Original Air Date: 2008-04-11 |
| Title: Sasha and Angler |
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| Season Episode: 4x21 |
| Episode: 84 |
| Production Number: |
| Original Air Date: 2008-05-23 |
| Title: Rufus and Buddy |
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| Season Episode: 4x24 |
| Episode: 87 |
| Production Number: |
| Original Air Date: 2008-06-13 |
| Title: Mateo and Ali |
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| Season Episode: 4x25 |
| Episode: 88 |
| Production Number: |
| Original Air Date: 2008-06-20 |
| Title: Jake and Kona |
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| Season Episode: 4x26 |
| Episode: 89 |
| Production Number: |
| Original Air Date: 2008-07-18 |
| Title: Fear of Dogs |
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| Season Episode: 4x28 |
| Episode: 91 |
| Production Number: |
| Original Air Date: 2008-08-01 |
| Title: Canine 9-1-1 (1) |
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| Season Episode: 4x30 |
| Episode: 93 |
| Production Number: |
| Original Air Date: 2008-09-05 |
| Title: Dueling Pit Bulls |
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| Season Episode: 4x31 |
| Episode: 94 |
| Production Number: |
| Original Air Date: 2008-09-12 |
| Title: Canine 9-1-1 (2) |
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| Season Episode: 4x33 |
| Episode: 96 |
| Production Number: |
| Original Air Date: 2008-10-03 |
| Title: Lotus and Joey |
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| Season Episode: 4x34 |
| Episode: 97 |
| Production Number: |
| Original Air Date: 2008-10-10 |
| Title: Bozley & Ginger |
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| Season Episode: 4x36 |
| Episode: 99 |
| Production Number: |
| Original Air Date: 2008-10-24 |
| Title: Argonaut and Patches |
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