There have been some extraordinary revelations in Battle Of The Sexes In The Animal World (World, 9.25pm), the absorbing BBC documentary series about the various ways that animals reproduce. It seems there is no end to the permutations for deception, betrayal, and outright conflict.
In this evening's episode, The Parental Dilemma, we reach probably the most controversial of all subjects: who takes care of the kids? As all parents will confirm, the hard part is not making babies but looking after them.
In the animal kingdom, parents face a serious dilemma: taking care of one lot of offspring narrows the chances of making more.
In the human world, the issue is not so much the desire to breed, but the desire to make a living, which does not sit easily with providing full-time childcare.
The concluding part of Anne Frank Remembered (World, 10pm) shows us the part of her life not documented by her diaries. There were not many who survived the kind of conditions Anne, her sister Margot, and their mother experienced first in Auschwitz, then in Bergen-Belsen, but film-maker Jon Blair has found them.
Listening to them talk about those events 50 years ago, it becomes apparent that they relive the experiences all the time.
