Each of the episodes of Planet of the Spiders, which aired in 1974, had a run time of more than 25 minutes.
24:40 4 May 1974 (1974-05-04) 25:02 11 May 1974 (1974-05-11) 24:58 18 May 1974 (1974-05-18) 23:53 25 May 1974 (1974-05-25) 24:01 1 June 1974 (1974-06-01) 24:43 8 June 1974 (1974-06-08) 
