Six albums were produced with the original Monkees lineup, four of which reached No. 1 on the "Billboard" chart. This success was supplemented by two years of the television program, a series of successful concert tours across America and abroad, and a trippy psychedelic movie, "Head", which is considered by some to have been ahead of its time. However, tensions, both musical and personal, were increasing within the group. The band finished a Far East tour in October 1968 (where Tork's copy of "Naked Lunch" was confiscated by Australian Customs) and then filmed an NBC television special, "33⅓ Revolutions per Monkee", which rehashed many of the ideas from "Head".