Series 4 - Radzi & Lindsey
More flea-bitten fun, chat and music from Hacker T Dog, but what will he make of Blue Peter presenters Radzi and Lindsey?
Series 5: 3. Millie & Jeremy
Series 6: 3. Lauren Layfield
Series 5: 1. Kia Pegg & Amy-leigh Hickman
Series 4 - Simon Rimmer
Comedy capers from Hacker T Dog, as well as a top flight documentary, Aeroport. Plus, has Hacker bitten off more than he can chew with TV chef Simon Rimmer?
Series 5: 2. Maggie Aderin-pocock
Series 4 - Bobby Lockwood
Chat, music and comedy from Hacker T Dog. Hacker tries to outfox Wolfblood's Bobby Lockwood.
Series 6: 10. Ricky Martin
Series 3 - Robbie Savage
More top line entertainment from the pooch with pedigree. Hacker tackles Robbie Savage with some footie banter.
Series 5: 10. Jay Rayner
Series 4 - Maisie Smith
Fun, chat and music with a cockney twist as Hacker's guest is EastEnders star Maisie Smith. Will he win her over or will she be on the dog and bone to her agent?
Series 3 - Sam And Mark
Featuring Hacker T Dog and his unique brand of entertainment - games, music, and comedy, all with a canine twist. Hacker winds up his special guests Sam and Mark.
Series 3 - Shannon Flynn
Hacker goes out on a howling high note in the final show of the series. His guest is Friday Download's very own Shannon Flynn.
Series 6: 4. Alison Hammond
Series 2 - Barney Harwood
Blue Peter bloke Barney Harwood finds himself on Hacker's chat show. He's used to appearing on TV, but Hacker Time is not like any other TV show.
Series 3 - Joe Pasquale
More chaotic canine comedy capers from Hacker and his production team, plus there is a familiar face in the Quarter Past Four O'Clock Club. His guest is Joe Pasquale.
Series 6: 2. Leona Vaughan & Louis Payne