Earl Green is the creator, curator, and head writer of theLogBook.com.
The 19th episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, commencing Dirk Maggs’ adaptation of Douglas Adams’ novel So Long, And Thanks For All The Fish, featuring the entire surviving cast of the original 1970s radio series. Jane Horrocks (Absolutely Fabulous) guest stars. 
The 94th episode of the prequel spinoff Star Trek: Enterprise airs on UPN. Peter Weller (RoboCop, Odyssey 5) guest stars.
The 705th episode of Doctor Who (the seventh since the series’ revival) airs on BBC1. Simon Pegg guest stars.
The 20th episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, continuing Dirk Maggs’ adaptation of Douglas Adams’ novel So Long, And Thanks For All The Fish. Hitchhiker’s Guide TV regulars David Dixon and Sandra Dickinson make their first appearances in the radio series.
The 95th episode of the prequel spinoff Star Trek: Enterprise airs on UPN. Peter Weller (RoboCop, Odyssey 5) guest stars.
The 96th episode of the prequel spinoff Star Trek: Enterprise airs on UPN. Star Trek: The Next Generation’s Jonathan Frakes and Marina Sirtis reprise their roles in a series finale that proves somewhat controversial within fandom. This is the final Star Trek production with Rick Berman as the executive producer.
The 706th episode of Doctor Who (the eighth since the series’ revival) airs on BBC1. Shaun Dingwall guest stars.
The Varese Sarabande CD Club releases Jerry Goldsmith‘s rejected score from the 1988 film Alien Nation as a limited edition CD.
The 21st episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, continuing Dirk Maggs’ adaptation of Douglas Adams’ novel So Long, And Thanks For All The Fish. Christian Slater (Mr. Robot, Heathers) guest stars.
The final film in the Star Wars prequel trilogy, Star Wars Episode III: Revenge Of The Sith is released, starring Ewan McGregor, Natalie Portman, Hayden Christensen, Jimmy Smits, Samuel L. Jackson, and Ian McDiarmid.
The 707th episode of Doctor Who (the ninth since the series’ revival) airs on BBC1. John Barrowman guest stars in the first appearance of Captain Jack Harkness (a character who will later led the spinoff series Torchwood); this is the first episode of a two-part story and is the first non-parody Doctor Who episode written by future showrunner Steven Moffat. The episode goes on to win a Hugo Award.
The 22nd episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, concluding Dirk Maggs’ adaptation of Douglas Adams’ novel So Long, And Thanks For All The Fish. Astronomer Sir Patrick Moore appears as himself.
The 708th episode of Doctor Who (the tenth since the series’ revival) airs on BBC1. John Barrowman guest stars in the conclusion of a two-part story written by future showrunner Steven Moffat. The episode goes on to win a Hugo Award.
Reverberations Records releases the album Homemade Spaceship: The Music Of ELO by Parthenon Huxley, a member of The Orchestra (the successors to ELO Part II). The album covers numerous classic ELO songs, but with radically different arrangements.
Big Finish Productions releases the 69th Doctor Who audio drama in its main monthly range, starring Colin Baker and Bonnie Langford.
The 23rd episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, the beginning of Dirk Maggs’ adaptation of Douglas Adams’ final Hitchhiker’s Guide novel, Mostly Harmless. Jonathan Pryce, Rula Lenska, Mitch Benn, and Andrew Secombe guest star.
Big Finish Productions releases the sixth Gallifrey audio drama, a Doctor Who audio spinoff starring Lalla Ward and Louise Jameson.
La-La Land Records releases Bear McCreary’s soundtrack from the first season of Sci-Fi Channel’s Battlestar Galactica reboot. Released by popular demand from the show’s fan base, the soundtrack displays the series’ rapidly evolving, complex musical direction, including the unusual dual main theme tunes (one used for broadcast in the UK, one used in the US). 
The 709th episode of Doctor Who (the 11th since the series’ revival) airs on BBC1. John Barrowman and Annette Badland guest star.
The 24th episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, adapting the novel Mostly Harmless. Jonathan Pryce and Andrew Secombe guest star.
The 710th episode of Doctor Who (the 12th since the series’ revival) airs on BBC1. John Barrowman and Paterson Joseph guest star.
The 25th episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, adapting the novel Mostly Harmless. Griff Rhys Jones and Andrew Secombe guest star.
Christopher Nolan’s Batman Begins is released, starring Christian Bale. Michael Caine, and Liam Neeson.
Big Finish Productions releases the fourth U.N.I.T. audio drama, a Doctor Who audio spinoff. Nicholas Courtney and David Tennant guest star in what is intended to be a “season finale”, though it will be several years before Big Finish revisits U.N.I.T. as its own audio spinoff.
The 711th episode of Doctor Who (the 13th since the series’ revival) airs on BBC1. The ninth Doctor regenerates, making him the second shortest-lived incarnation of the Time Lord (after Paul McGann); even Colin Baker outlasted Eccleston in the role. John Barrowman and Paterson Joseph guest star; David Tennant makes his first brief appearance as the tenth Doctor.
Computer pioneer Jack Kilby, a Nobel Prize winner for his part in creating the integrated cicruit, dies of cancer at the age of 81. A long-time employee of Texas Instruments, he co-invented the integrated circuit, which made the current advances in miniturization of computer technology possible. (Prior to that, even minimal computing power often occupied an entire room.) He also counted the handheld calculator among his inventions. Though he retired from TI in the early 80s, he continued to consult for the company until the time of his death.
The 26th episode of the radio science fiction comedy series The Hitchhiker’s Guide To The Galaxy is broadcast on BBC Radio, concluding Dirk Maggs’ adaptation of the novel Mostly Harmless. Maggs takes liberties with the end of Adams’ novel, negating the book’s original ending (for which Adams himself had expressed regret after publication) and reuniting most of the original cast for a happier ending than their characters met in print.
Decca Records releases John Williams‘ soundtrack from the 2005 movie adaptation of War Of The Worlds.
Big Finish Productions releases the 70th Doctor Who audio drama in its main monthly range, starring Sylvester McCoy and Bonnie Langford.
Big Finish Productions releases the seventh Gallifrey audio drama, a Doctor Who audio spinoff starring Lalla Ward and Louise Jameson.