Debut & origin of the Wrecker.
Sif appears on a cover for the 3rd time.
Cover by Jack Kirby and Joe Sinnott
The 16 page Lee/Kirby Thor story is embellished by Colletta.
There is also a 5 page non-Thor back-up by Lee/Kirby/Sinnott.
Thor's 13th appearance of 1966 was his 87th of all time.
For the third time in Comics History two comics with Thor on the cover shipped the same month.