who played alf on the tv show?
Paul Fusco
contradiction
 The first series was therefore the first BBC radio comedy to use stereophonic techniques . Adams later said that before Hitchhiker 's , stereo was deemed impossible for radio comedy and after it was made compulsory . Producer Geoffrey Perkins recalled that the technology available in 1978 for mixing sound effects at the BBC 's Paris Theatre radio studio was limited . The production had one eight track tape recorder at their disposal and so many of the effects in the programme were mixed " live " with tape loops of background sound effects strung around the recording studio . Actors whose speech needed to be modified in post @-@ production by Radiophonic technicians , such as Stephen Moore 's performance as Marvin the Android , were recorded in isolation from the main " humanoid " characters . Allegedly , Moore recorded most of his performance in a cupboard and met the other actors only after the first session was complete . 

contradiction
 Bill Wallis , who played Mr. Prosser and Prostetnic Vogon Jeltz in the original series , was unavailable , and Toby Longworth took the role of Jeltz in the new series . John Marsh , who had been the continuity announcer for Fits Two to Twelve , was rehired to reprise this role . There was also a posthumous cameo role by Adams as Agrajag , edited from his BBC audiobook recording of the novel . 

entailment
 The show is centered on the character of Professor Bernard Quatermass who , albeit older than in the previous series , is " the same very concerned scientist " but worried about his previous decisions . Andrew Keir , who had played Quatermass in the 1967 Quatermass and the Pit , was chosen to voice the character . Later , Nigel Kneale himself became dismissive of the serial , but critics gave the production relatively positive reviews . 

contradiction
 The pilot featured only a small cast of characters , and following its commission into a series there was a need for additional characters . Many were picked for their roles in previous series , for example according to Adams , Mark Wing @-@ Davey had played a character in The Glittering Prizes " who took advantage of people and was very trendy " making him suitable for the role of Zaphod . Meanwhile , Richard Vernon , who was noted for his portrayal of " grandfatherly types " , was chosen to be Slartibartfast . Other main characters included Susan Sheridan as Trillian and Stephen Moore as Marvin . 

neutral
 Following positive reviews and high listening figures , the second series was able to attract a number of guest appearances from well known actors , including Peter Davison , Steve Coogan , and Kate O 'Mara . The third series featured appearances from Julia Davis and David Tennant . 
