* 67/xx/xx Double Strip * 67/xx/xx The Cable Car Experiment * 67/xx/xx The Duel * 67/xx/xx The Hitch Hiker * 67/xx/xx The Mines of Fallun * 67/xx/xx The Sandman * 68/xx/xx A Perfectly Happy Life * 68/xx/xx Breaking Strain * 68/xx/xx Dr Heidegger's Experiment * 68/xx/xx Monkey's Paw * 68/xx/xx Mr Higginbottom's Catastrophe * 68/xx/xx The Signal Man * 68/xx/xx The Strange History of David Swann