When Irish author and poet
Johnny Byrne was hired for six weeks to quickly produce shootable material for the series (which had gone into production with only one completed script—its premiere episode, "
Breakaway"), he was handed a screenplay from American television writer
Art Wallace entitled "Siren Planet". With the script written for an earlier format of the series, Bryne was forced to do a complete re-write. Byrne reconceived the story as a science-fiction mystery, retaining as its core concept the return of Helena's dead husband and adding the threat of antimatter. Completed in two weeks, it was this script that convinced story consultant
Christopher Penfold to bring Byrne on staff full-time. The original material seemed to be more of an homage to the 1970 novel
Solaris by Polish author
Stanisław Lem, with facsimiles of the staff's dead relatives appearing on Alpha to prevent their landing on the planet. Rather than give warning, aliens in the guise of Helena's late husband (named
Telford Russell at this point) and, in the climax, Koenig's late father would use deception and trickery to manipulate the Alphans.
Zienia Merton recalls when reading the script, she was expected to sweep a large spider off the shoulder of
Prentis Hancock's character Morrow. Suffering from
arachnophobia, she panicked and stormed the office of producer
Sylvia Anderson. Taking in Merton's agitated state, Anderson jumped to conclusions and asked if she was pregnant. Fortunately, the real problem was easily solved with a minor re-write of the script: Hancock's character was killed and Merton's blinded. This episode introduced the character of David Kano, head of the Technical Section and resident computer expert, played by
Clifton Jones. Jones had been brought in quickly to replace actor
Lon Satton, who had proved unpopular with the cast during the filming of "Breakaway"; the shooting script still contained his character's name, Benjamin Ouma.
Music An original score was composed for this episode by
Barry Gray. The electric guitar solo track played while Lee Russell goes berserk was conceived and performed by
Sylvia Anderson's son-in-law, musician
Vic Elmes. A music track from the
Gerry Anderson film
Thunderbirds Are Go also composed by Gray was used. With production delays plaguing the premiere episode, "
Breakaway", the music for this segment was the first to be composed and recorded. ==Reception==