THAT EXCLAMATION MARK says it all. Textbook “sideways-look-at” kids sitcommery penned by BOB “RENTAGHOST” BLOCK, here substituting wacky aliens for “visitors from the spirit world” and 25th century spacemen for Harold and Ethel Meeker. Whole thing enlivened by unlikely presence – in voice form only – of KENNETH WILLIAMS played onboard ship computer SID. Further zaniness epitomised by character names like Dinwiddy Snurdle. Blue-screen blarney supplied, as ever, by MATT IRVINE.