The next to last of the Bee Gee's "old-style" albums is one of their most fully realized works, with pleasing and memorable songs from beginning to end, and for a change this time, it's the single ("Run to Me"), rather than the surrounding tracks, that suffers from predictability. Another in a string of haunting ballads, it has a more plaintive, whining quality, and less of an ethereal feel than its predecessor, "How Can You Mend a Broken Heart" -- not that "Run to Me" isn't a lovely song, but it was possible to tire of hearing it on the radio faster than their prior singles. By contrast, the album's other tracks are all intensely melodic and varied enough in tempo and texture to make for very satisfying listening, "You Know It's for You" calling to mind Paul McCartney at his most accessible; the group plunges into relatively hard rock, with a heavy guitar sound, on "Bad Bad Dreams," and a country-ish sound on "Road to Alaska," before returning to a kind of post-psychedelic mode in "Sweet Song of Summer." The Bee Gees were pushing their credibility as a cohesive band more than ever, emphasizing Barry Gibb and Maurice Gibb's contributions to their instrumental sound and retaining guitarist Alan Kendall, who had debuted with them on the Trafalgar album and who would play with them for the next two decades. As it turned out, To Whom It May Concern was also the commercial swan song for the trio in this phase of their career, and the last of their albums to be released by Atlantic Records in the United States, something of an artistic peak before a period of massive change in their sound and future.
AllMusic Review by Bruce Eder