Arthur and Ford are marooned on Orfintlewoodle (Earth). Zaphod also escapes from the stolen spaceship and makes his way to Ursa Minor Beta, to the offices of the Hitchhikers Guide To The Galaxy. Marvin appears and they are once more in peril when Frogstar fighters begin to bomb the offices. Later the building is removed from the planet and taken to the Frogstar itself. 

Cast: 

What became "Fit the Seventh" actually started as a "Christmas Special" episode, and an early draft included a reference to the holiday, though the episode, as transmitted, does not. Five further episodes, to complete the second series (later retitled "The Secondary Phase") were commissioned in May 1979. These final five episodes (the last on radio until 2004) were 'stripped,' or broadcast on each of five days in a single week in January 1980. 

Zaphod's stolen ship is the personal cruiser of the admiral of a Haggunenon battle fleet. The crew are organic and evolve constantly. Soon the ship is hazardous to our hapless travellers as the crew evolve in a hostile manner. Ford and Arthur escape back millions of years and arrive on a Golgafrincham Space Ark, full of froxen middle men. The ship crashes into a primitive planet. 

Written by Douglas Adams and John Lloyd

Cast: 

Music: Oxygène by Jean Michel Jarre; Volumina by György Ligeti; Volkstanz from Einsteig by Gruppe Between. The regular ending music is replaced with What a Wonderful World by Louis Armstrong.

A timely explosion on Magrathea fires the crew millions of years forward in time. They arrive in Milliways, the Restaurant at the Edge of the Universe. Marvin is there, having remained on the planet until Milliways was built. Zaphod steals another spaceship. 

Written by Douglas Adams and John Lloyd

Cast: 

Music: Melodien by György Ligeti; The Engulfed Cathedral from Snowflakes are Dancing by Isao Tomita; A Rainbow in Curved Air by Terry Riley; Wind on Water from Evening Star by Fripp and Eno.

The planet is not dead. Engineers are at work making a new Earth to replace the one that was destroyed five minutes too early. The Earth was built by incredibly advanced beings we know as mice as an organic computer for calculating The Question to meaning of life. They want Arthur as a short cut to find out the meaning directly from his brain. The police arrive to get back the stolen space ship. 

Cast: 

Music: A Rainbow in Curved Air by Terry Riley; Moon City from In Search of Ancient Gods by Absolute Elsewhere; Mikrophonie I by Stockhausen.

The Heart of Gold enters orbit around Magrathea, a near-mythical dead planet once famed for its construction of custom-designed planets. Zaphod insists on landing, despite the automatic defenses. After a vicious attack, they fire the infinite probability drive and land safely. But all is not well - Slartibartfast is alive and kicking. 

Cast: 

Music: Kotakomben from Einsteig by Gruppe Between; Space Theme from Go by Go; Continuum (Ligeti) by György Ligeti; Oxygène by Jean Michel Jarre; That's Entertainment; Shine On You Crazy Diamond by Pink Floyd; Rock and Roll Music by The Beatles; Wind On Water from Evening Star by Fripp and Eno; Over Fire Island from Another Green World by Brian Eno

Arthur Dent and Ford Prefect are thrown off the Vogon space ship by the captain, having been subjected to hearing Vogon poetry. Once again they are rescued, this time by Zaphod Beeblebrox, on the ship The Heart of Gold. Also on board are Marvin, the permanently depressed robot, and the only other survivor of the human race, Trillian. As Zaphod had stolen the ship the cops are after them.

Cast:

Music: "Wind on Water" from Evening Star by Fripp and Eno; A Rainbow in Curved Air by Terry Riley; Poppy Nogood and the Phantom Band by Terry Riley; Cachuaca by Patrick Moraz.

Arthur Dent discovers his house is to be bulldozed to make way for a bypass. Later he finds that Earth is to be destroyed as well. He escapes on a Vogon spaceship with his friend Ford Prefect.

Cast:

Music: "Journey of the Sorcerer" from One of These Nights by The Eagles; Lontano by György Ligeti; A Rainbow in Curved Air by Terry Riley; Volumina by György Ligeti.