It's definitely cool and always a treat to have Benton and Yates back, especially with the actors returning.  Coupled with Kate Stewart and Osgood, it is a great experience having old UNIT meeting with the new.

Unfortunately while the cast and their character's presence here is a memorable part of the audio adventure, Call to Arms is kind of a boring affair overall.  I really wasn't drawn into the Silurian side of the plot here.  They aren't very compelling as foes for UNIT and I wasn't left excited for the rest of the UNIT: Assembled box set.  In this audio they are depicted as hunters, eagerly howling as they pursue their prey.  It was interesting at first but got annoying pretty quickly.  Jastrok, the leader of this batch of Silurians, did not connect with me as a character at all - he just feels like a generic villain.  And while that box set would go on to have at least some impressive moments to it, I feel like we start off in a pretty rough and underwhelming place here.

Still, in spite of this story not leaving much of an impression on me, the cast and recording is of a good enough quality that it wasn't too hard to listen through Call to Arms, either.  To its credit, it is far from a miserable experience and a reasonable way to get into the larger story going on with the Silurians.  It is cool seeing how UNIT has learned to deal with and monitor the Silurians since their early encounter with this species.  I did also like Bessie's surprise appearance near the end, that did make me smile.