alternatives to the planet Aridius included ancient Egypt, wherein the first pyramid is built over the location of a destroyed Dalek, and the planet Stygian, where the variable light waves render all living matter invisible. One of the few elements edited by Spooner included the Time-Space Visualiser; gifted by the Xerons to the Doctor at the end of The Space Museum (1965), the machine was added to The Chase to maintain continuity between stories—before this rewrite, the device was previously known as a Time Curve Visi-Scope and was invented by the Doctor. Spooner also changed the scene in which Ian and Vicki enter the tunnels in the first episode; in the original draft, they were dragged down by a colony of Mire Beasts. An external model sequence of the haunted house in the fourth episode was cut from the script when the reasoning behind the sequence—taking place in a futuristic theme park attraction as opposed to inside the minds of its occupants—was changed. In a draft script, the city from the fifth episode was referred to as "a real Frank Lloyd Wright edifice". A substantial part of the serial's budget was allocated to the construction of the Mechonoids, with a total cost of ; they were given a press launch on 14 April 1965, and their merchandising rights were offered to manufacturers. An early intention was for the first episode to feature the Beatles, dressed as old men, performing in the studio as part of a fictional 50th anniversary concert; the idea was rejected by the band's manager, Brian Epstein, who thought it would be poor for the group's image. The production team enquired about obtaining material of the Beatles from Top of the Pops, but discovered that most episodes had been wiped after broadcasting; they were offered a November 1964 recording of "I Feel Fine" at Riverside Studio. However, after the group performed their new song "Ticket to Ride" on Top of the Pops in April, Epstein consented to one minute of its usage on the show. This had the unintended effect of making the first episode of The Chase the only remaining source of any surviving Beatles footage from Top of the Pops, as much of the show was wiped. Directing and music Richard Martin was chosen to direct the serial; he was reluctant to agree, but Lambert convinced him as he had become known as the "Dalek