“Remember Sunday” is a sweet new TV film about a lonely waitress (Alexis Bledel) who falls for a jewelry store clerk (Zachary Levi) despite his annoying forgetfulness. Turns out he suffered a brain aneurysm and his memory is virtually nonexistent, so every day is a new day. 8 p.m., ABC.

“The Bletchley Circle” is an intriguing murder mystery, set in 1952, that follows three women who did intelligence work for the U.K. during World War II. Now they’ve reunited to decode the pattern behind a series of ghastly killings. 9 p.m., PBS.