A Visit from Prof. Summerfield (webcast)

A Visit from Prof. Summerfield was a short, festive webcast released in late 2020, on Big Finish Productions' official YouTube channel. It promoted and framed the short story anthology, The Christmas Collection, which was released on the same day.

Publisher's summary
Have a very Benny Christmas!

Plot
Arriving at an old tomb, bottle in hand, Professor Bernice Summerfield encounters a creature. The creature tells Benny there's no need to fear it, so long as she shares a drink. As they sit there, drinking away, Benny reminisces about some of her previous adventures. They finish the bottle, so Benny knows she needs to go back to her shuttle, and she wishes the creature farewell.

Characters

 * Bernice Summerfield
 * A creature

Worldbuilding

 * Benny tells the creature that "this wasn't the solstice [I'd] planned".
 * Benny and the creature drink sherry.
 * When telling the creature about her adventures, Benny mentions Dellah, Legion, Unbound, the Collection, Time Rings, the Grel, and "some chap called the Master".
 * Benny also mentions Peter, Adrian, Jason, Jack, Ruth, Bev, Wolsey and her frenemy, Brax.
 * After finishing the sherry, she tells the creature to "tuck yourself in for a call from Saint Nick".

Continuity

 * Santa Claus exists and delivers presents at Christmas. (COMIC: A Christmas Story, AUDIO: Iris Wildthyme and the Claws of Santa, TV: Last Christmas, etc.)