When Carnell decided, in 1963, to close the magazine, Michael Moorcock wrote an impassioned letter of comment arguing for its continuance. Partly as a result of this, when a new publisher (Roberts & Vinter) was found for the magazine, Carnell recommended Moorcock as the new editor, and he duly took over in May 1964, with the magazine shifting to a paperback format. This period lasted a mere three years, initially with a bi-monthly schedule and then the standard monthly schedule, before the publisher went into receivership.
However, it had forged a reputation for itself in this period and, as a result of Brian Aldiss contacting the Arts Council on its behalf, it received a grant that allowed it, in 1967 after a brief hiatus, to continue in the large, glossy, format in which it became most famous/notorious. It struggled on in this format for a mere four years, with a variety of publishers and editors, until finally winding down (in that format) with a subscription-only issue (#201) in 1971.
Meanwhile, Moorcock had been investigating other avenues for New Worlds and 1971 also saw the launch of a quarterly paperback anthology series called New Worlds Quarterly. The schedule proved too ambitious, however, and the name reverted to New Worlds with the sixth issue, with the series as a whole folding after the tenth issue in 1976. Confusingly a series of six issues was also published by a different publisher in the US, with the first 4 US issues identical to the UK ones, the fifth US issue being a reprint of the sixth UK issue, and the sixth US issue a reprint of the seventh UK issue with a number of changes! Although this series did not officially continue the numbering of issues from the previous series, future series have been numbered as if they did, so issue numbers have been assigned as appropriate.
Two years later, the magazine saw a brief re-appearance as a semi-prozine, although this only lasted five issues from 1978 to 1979. There was then a hiatus of 12 years until the magazine reappeared in 1991 as an annual trade paperback, which lasted for four issues, and two separate one-off issues in 1996 and 1997. Although nothing has been heard of the magazine since, there is little doubt it will reappear before long in yet some other format.
| 1939 | v1 #1, Mar | v1 #2, Apr | v1 #3, May | v1 #4, Aug | ||||||||
| 1946 |  v1 #1 (Jul) |
 v1 #1 (alt) |
 v1 #2 (Oct) |
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| 1947 |  v1 #3 (Oct) |
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| 1948 | ||||||||||||
| 1949 |  v2 #4 |
 v2 #5 |
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| 1950 |  v2 #6 Spring |
 v3 #7 Summer |
 v3 #8 Winter |
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| 1951 |  v3 #9 Spring |
 v4 #10 Summer |
 v4 #11 Fall |
 v4 #12 Winter |
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| 1952 |  v5 #13 Jan |
 v5 #14 Mar |
 v5 #15 May |
 v6 #16 Jul |
 v6 #17 Sep |
 v6 #18 Nov |
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| 1953 |  v7 #19 Jan |
 v7 #20 Mar |
 v7 #21 Jun |
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| 1954 |  v8 #22 Apr |
 v8 #23 May |
 v8 #24 Jun |
 v9 #25 Jul |
 v9 #26 Aug |
 v9 #27 Sep |
 v10 #28 Oct |
 v10 #29 Nov |
 v10 #30 Dec |
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| 1955 |  v11 #31 Jan |
 v11 #32 Feb |
 v11 #33 Mar |
 v12 #34 Apr |
 v12 #35 May |
 v12 #36 Jun |
 v13 #37 Jul |
 v13 #38 Aug |
 v13 #39 Sep |
 v14 #40 Oct |
 v14 #41 Nov |
 v14 #42 Dec |
| 1956 |  v15 #43 Jan |
 v15 #44 Feb |
 v15 #45 Mar |
 v16 #46 Apr |
 v16 #47 May |
 v16 #48 Jun |
 v17 #49 Jul |
 v17 #50 Aug |
 v17 #51 Sep |
 v18 #52 Oct |
 v18 #53 Nov |
 v18 #54 Dec |
| 1957 |  v19 #55 Jan |
 v19 #56 Feb |
 v19 #57 Mar |
 v20 #58 Apr |
 v20 #59 May |
 v20 #60 Jun |
 v21 #61 Jul |
 v21 #62 Aug |
 v21 #63 Sep |
 v22 #64 Oct |
 v22 #65 Nov |
 v22 #66 Dec |
| 1958 |  v23 #67 Jan |
 v23 #68 Feb |
 v23 #69 Mar |
 v24 #70 Apr |
 v24 #71 May |
 v24 #72 Jun |
 v25 #73 Jul |
 v25 #74 Aug |
 v25 #75 Sep |
 v26 #76 Oct |
 v26 #77 Nov |
 v26 #78 Dec |
| 1959 |  v27 #79 Jan |
 v27 #80 Feb |
 v27 #81 Mar |
 v28 #82 Apr |
 v28 #83 May |
 v28 #84 Jun |
 v29 #85 Jul |
 v29 #86 Aug/Sep |
 v29 #87 Oct |
 v30 #88 Nov |
 v30 #89 Dec |
|
| 1960 |  v30 #90 Jan |
 v31 #91 Feb |
 v31 #92 Mar |
 v31 #93 Apr |
 v32 #94 May |
 v32 #95 Jun |
 v32 #96 Jul |
 v33 #97 Aug |
 v33 #98 Sep |
 v33 #99 Oct |
 v34 #100 Nov |
 v34 #101 Dec |
| 1961 |  v34 #102 Jan |
 v35 #103 Feb |
 v35 #104 Mar |
 v35 #105 Apr |
 v36 #106 May |
 v36 #107 Jun |
 v36 #108 Jul |
 v37 #109 Aug |
 v37 #110 Sep |
 v37 #111 Oct |
 v38 #112 Nov |
 v38 #113 Dec |
| 1962 |  v38 #114 Jan |
 v39 #115 Feb |
 v39 #116 Mar |
 v39 #117 Apr |
 v40 #118 May |
 v40 #119 Jun |
 v40 #120 Jul |
 v41 #121 Aug |
 v41 #122 Sep |
 v41 #123 Oct |
 v42 #124 Nov |
 v42 #125 Dec |
| 1963 |  v42 #126 Jan |
 v43 #127 Feb |
 v43 #128 Mar |
 v43 #129 Apr |
 v44 #130 May |
 v44 #131 Jun |
 v44 #132 Jul |
 v45 #133 Aug |
 v45 #134 Sep |
 v45 #135 Oct |
 v46 #136 Nov |
 v46 #137 Dec |
| 1964 |  v46 #138 Jan |
 v47 #139 Feb |
 v47 #140 Mar |
 v47 #141 Apr |
 v48 #142 May/Jun |
 v48 #143 Jul/Aug |
 v48 #144 Sep/Oct |
 v48 #145 Nov/Dec |
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| 1965 |  v48 #146 Jan |
 v48 #147 Feb |
 v48 #148 Mar |
 v48 #149 Apr |
 v48 #150 May |
 v49 #151 Jun |
 v49 #152 Jul |
 v49 #153 Aug |
 v49 #154 Sep |
 v49 #155 Oct |
 v49 #156 Nov |
 v49 #157 Dec |
| 1966 |  v49 #158 Jan |
 v49 #159 Feb |
 v49 #160 Mar |
 v49 #161 Apr |
 v49 #162 May |
 v50 #163 Jun |
 v50 #164 Jul |
 v50 #165 Aug |
 v50 #166 Sep |
 v50 #167 Oct |
 v50 #168 Nov |
 v50 #169 Dec |
| 1967 |  v50 #170 Jan |
 v50 #171 Feb |
 v50 #172 Mar |
 v51 #173 Jul |
 v51 #174 Aug |
 v51 #175 Sep |
 v51 #176 Oct |
 v51 #177 Nov |
 #178 Dec |
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| 1968 |  #179 Feb |
 #180 Mar |
 #181 Apr |
 #182 Jul |
 #183 Oct |
 #184 Nov |
 #185 Dec |
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| 1969 |  #186 Jan |
 #187 Feb |
 #188 Mar |
 #189 Apr |
 #190 May |
 #191 Jun |
 #192 Jul |
 #193 Aug |
 #194 Sep |
 #195 Nov |
 #196 Dec |
|
| 1970 |  #197 Jan |
 #198 Feb |
 #199 Mar |
 #200 Apr |
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| 1971 |  #201 Mar |
 New Worlds Quarterly (#202) |
 New Worlds Quarterly 2 (#203) |
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| 1972 |  New Worlds Quarterly 3 (#204) |
 New Worlds Quarterly 4 (#205) |
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| 1973 |  New Worlds Quarterly 5 (#206) |
 New Worlds 6 (#207) in US as New Worlds #5 (1974) |
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| 1974 |  New Worlds 7 (#208) in US, with some changes, as New Worlds #6 (1974) |
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| 1975 |  New Worlds 8 (#209) |
 New Worlds 9 (#210) |
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| 1976 |  New Worlds 10 (#211) |
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| 1977 | ||||||||||||
| 1978 | #212, Spring |  #213, Summer |
 #214, Winter |
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| 1979 |  #215, Spring |
 #216, Sep |
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| 1991 |  New Worlds 1 (v62 #217) |
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| 1992 |  New Worlds 2 (v62 #218) |
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| 1993 |  New Worlds 3 (v62 #219) |
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| 1994 |  New Worlds 4 (v62 #220) |
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| 1995 | ||||||||||||
| 1996 |  New Worlds No. 221 (#221) |
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| 1997 |  New Worlds (v64 #222) |
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| 1960 |  v1 #1 Mar |
 v1 #2 Apr |
 v1 #3 May |
 v1 #4 Jun |
 v1 #5 Jul |