In the 1970s, he also acted in radio comedies, including the weekly topical satire Week Ending (in which he regularly played such figures as then UK Foreign Secretary Dr David Owen) and The Hitchhiker's Guide to the Galaxy (as the "B Ark Captain" in the sixth episode). Jason also appeared in The Next Programme Follows Almost Immediately and made appearances on panel games such as The Impressionists as well as his own series, The Jason Explanation. In the early 1970s, he appeared in Mostly Monkhouse.
In the 1970s he also acted in radio comedies including the weekly topical satire Week Ending (in which he regularly played such figures as then UK Foreign Secretary Dr David Owen) and The Hitchhiker's Guide to the Galaxy (as the "B Ark Captain" in the sixth episode) Jason also appeared in The Next Programme Follows Almost Immediately and made appearances on panel games such as The Impressionists as well as his own series The Jason Explanation In the early 1970s he appeared in Mostly Monkhouse