15:55Transformers: EarthSparkSeries 1What Dwells WithinCBBC Duration: 21 minutes Sat 9th Mar 2024, 15:55 on CBBC HDAvailable for yearsWatch nowThe Malto kids are lost in a maze of tunnels with a mysterious monster stalking them. GenresChildren'sBrandTransformers: EarthSparkSeriesTransformers: EarthSpark: Series 1 Source: BBC Online