In 1995 and 1996, Taran and Richard were on the PBS children's television show called Bill Nye The Science Guy.

Taran was in the episode called Energy, and Richard was in the episode titled Archaeology. Taran was on the show in 1995, while Richard was on it in 1996.

Here is a video of Taran's appearance:

https://www.youtube.com/watch?v=8qmSzMwTkpk

His appearance is brief, and he appears towards the beginning.

And here is Richard's appearance:

https://www.youtube.com/watch?v=pc2sWomcmDk