1) BBC television drama 2) Box office surprises 3) British television miniseries 4) Certain train segments 5) Convertible sofas 6) Dozing ones 7) Jammies 8) Pajamas 9) Planted spies 10) Pullmans of yore 11) Pyjamas 12) Slang for phenobarbital 13) Some yo-yo tricks 14) Surprise hits 15) Surprise successes Found on https://www.crosswordclues.com/clue/sleepers
(Npc faction) The ancient race release in the Eve online expansion entitled Apocrypha. They reside in Wormhole (W-space) and the materials salvage or gained from them are use in the creation of Tech 3 (T3) ships. Found on http://wiki.eveonline.com/en/wiki/Glossary
Planks to which rails, of railways or waggonways, can be attached so as to stop movement when a load passes over. Often used as fence-posts near disused railway lines. Found on http://www.encyclo.co.uk/local/20766