The Trap Door
Plasticine creatures in a castle basement, with a theme built from a voice going "don't you open that trap door".
The Trap Door opens with a main title sequence of 52 seconds.
It arrived on ITV in 1984, when The Sooty Show, Thomas & Friends and Thomas the Tank Engine & Friends were also on the network.
The opening titles
Season 1
52sFan upload.
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2 sequences
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