Sgt. Yemana is at his desk reading a TV Guide dated the week of October 8, 1977, with Donny and Marie Osmond on the cover.
The movie of the week the copycat is imitating is The Taking of Pelham One Two Three (1974). A NYC Subway is hijacked but no one rides on the outside of the train. The film was remade in 2009 as The Taking of Pelham 123.
They episode in which Lucy is pregnant is called "Lucy Is Enceinte (1952)". Enceinte is french for enclosure or pregnant.