The fourth series began on 25 February 1968 and ran for 16 episodes to 9 June. After the first episode Williams was unimpressed with the new material, and wrote in his diary "Now there are 4 writers on it! It is unbelievable really. Four! For half an hour of old crap with not a memorable line anywhere ... of course one goes on and flogs it gutless and the rubbish gets by". Without Feldman, Took was enjoying the show less than he had previously. He also felt the humour was becoming more obviously dirty and complained to Williams that "We might as well write a series called "Get Your Cock Out"".