It is variously referred to as a thing, a blob and an alien, unmistakable references to recognizable movie monstrosities.

Nevertheless, there are unmistakable references to contemporary culture, for instance Mick Jagger appears in some episodes.

There are two unmistakable references to homosexuality.

Yet only in the final scene is there an unmistakable, overt reference to contemporary politics.

A prodigious reader of 19th-century literature, Robb finds such references plain and unmistakable.

The first unmistakable reference to Pope Leo is in 429 when he was only a deacon.

Yet as I watched a few episodes from the first year, my eye was struck by what seemed like unmistakable references to artworks of far more recent vintage.

The ads contain an unmistakable reference to her relationship with Mr. Hart: "I make no excuses," she says.

"The biggest responsibility falls on those countries with the biggest emissions," he said, in an unmistakable reference to the United States.

Only the big central elevator which extended in a straight line from pole to pole through the sphere furnished an unmistakable reference for orientation.